Custom size solid surface basins are common in B2B projects because cabinet dimensions, room layouts, and brand programs rarely follow one fixed standard. The key is to define what needs to change and what must remain stable for production.
Use the following points as a working checklist rather than a broad product introduction. The details are written for B2B buyers who need to coordinate quotations, samples, project documents, and repeat orders with fewer surprises.
Main dimensions: length, width, and height
Length and width usually come from cabinet size or project layout. Height affects both appearance and installation. Buyers should send drawings with exact dimensions, not only target cabinet width. For custom dimension review, start with the Custom Sizes service page and prepare the cabinet or counter drawing.
For a purchasing team, this point should be recorded in a shared specification file rather than left in a chat message. Include the model number, drawing version, requested finish, quantity, packing note, and the person who approved the detail. That record helps the cabinet factory, project contractor, distributor, and supplier work from the same information when the order moves from quotation to sample and then to bulk production.
During sample review, check the physical product against the drawing and the quotation line by line. Measure the main dimensions, inspect the surface finish under normal light, test the drain and faucet hole positions against the cabinet plan, and take clear photos for the order file. A sample should not be approved only because the general appearance looks acceptable.
Bowl position and bowl size
Bowl position may be centered, left, right, or adjusted for plumbing. Bowl size should consider daily use, splash control, drawer space, and drain alignment. If the basin is part of a vanity program, confirm whether several cabinet widths need the same bowl style.
Buyers should also ask what information is still missing before the supplier can quote accurately. Missing details often include faucet type, overflow requirement, cabinet drawing, carton mark, delivery window, or the exact material wording needed for the project file. Clarifying these items early makes the quotation more useful and reduces the chance of rework after sample approval.
For bulk orders, the same detail should be repeated consistently. Ask how the supplier will separate models, mark cartons, protect corners, report inspection results, and communicate shipment readiness. This is especially important when one purchase order includes several sizes or when the products will be installed in different floors, buildings, or room types.
Faucet hole, overflow, and drain details
Faucet hole position depends on tap type and rear ledge space. Overflow may be required by some markets or project specifications. Drain position should match the cabinet and plumbing plan. These details are small on a drawing but expensive to change after sample approval.
During sample review, check the physical product against the drawing and the quotation line by line. Measure the main dimensions, inspect the surface finish under normal light, test the drain and faucet hole positions against the cabinet plan, and take clear photos for the order file. A sample should not be approved only because the general appearance looks acceptable.
If the buyer is comparing several suppliers, use the same checklist for each one. A supplier who gives a lower unit price but cannot confirm drawings, packing, inspection, or material wording may create extra cost later. A practical comparison should include sample cost, expected lead time, packing method, communication quality, and how clearly the supplier handles changes before production.
Finish, color, and material requests
Acrylic Solid Surface is the standard material for QINGDA catalog and custom basin discussions. Corian material available upon request can be reviewed for selected custom projects when the model, quantity, finish, and schedule are suitable. Buyers can review Corian Material Option before sending a material-specific inquiry.
For bulk orders, the same detail should be repeated consistently. Ask how the supplier will separate models, mark cartons, protect corners, report inspection results, and communicate shipment readiness. This is especially important when one purchase order includes several sizes or when the products will be installed in different floors, buildings, or room types.
Keep the material statement consistent through the whole process. Acrylic Solid Surface is the standard material for QINGDA catalog basins. Corian material available upon request should be used only when the buyer has specifically asked for that option and the selected project has been reviewed. This avoids incorrect catalog claims and keeps quotations clear for downstream buyers.
Packaging customization
Custom size basins may also need custom cartons, labels, or protection. Long basins and integrated vanity tops require careful edge protection. For private-label or distributor programs, confirm logo, carton mark, barcode, instruction sheet, and model label requirements before quotation.
If the buyer is comparing several suppliers, use the same checklist for each one. A supplier who gives a lower unit price but cannot confirm drawings, packing, inspection, or material wording may create extra cost later. A practical comparison should include sample cost, expected lead time, packing method, communication quality, and how clearly the supplier handles changes before production.
For a purchasing team, this point should be recorded in a shared specification file rather than left in a chat message. Include the model number, drawing version, requested finish, quantity, packing note, and the person who approved the detail. That record helps the cabinet factory, project contractor, distributor, and supplier work from the same information when the order moves from quotation to sample and then to bulk production.
How to prepare the inquiry
Send the base model, target dimensions, drawing, bowl position, faucet hole, overflow, finish, quantity, packing requirements, and delivery schedule. The Custom Designs service page can help with shape discussions, and contact QINGDA is the best route when drawings are ready for review.
Keep the material statement consistent through the whole process. Acrylic Solid Surface is the standard material for QINGDA catalog basins. Corian material available upon request should be used only when the buyer has specifically asked for that option and the selected project has been reviewed. This avoids incorrect catalog claims and keeps quotations clear for downstream buyers.
Buyers should also ask what information is still missing before the supplier can quote accurately. Missing details often include faucet type, overflow requirement, cabinet drawing, carton mark, delivery window, or the exact material wording needed for the project file. Clarifying these items early makes the quotation more useful and reduces the chance of rework after sample approval.
Final review before sending the inquiry
Before contacting a supplier, prepare a compact inquiry package: selected model or drawing, target size, quantity, application, finish, faucet hole and overflow requirements, packing request, delivery schedule, and any material specification. This gives QINGDA enough information to respond with practical comments instead of a generic reply.
The final check is simple: the product should match the cabinet or project layout, the material wording should be accurate, the packing should fit the delivery plan, and the buyer should know what must be approved before production starts. When these points are clear, a solid surface wash basin order is easier to quote, sample, inspect, and repeat.