| Product fit and design | Available cup diameters, overall height, mounting style, stem or thread options, and compatibility with the intended furniture surface. | Dimensioned drawings, material specifications, and samples of the proposed configuration. | Measure samples and test them on the actual surface. Confirm that the contact area is smooth, clean, and suitable for suction attachment. |
| Material identification | Declared elastomer or polymer type, hardness range, color options, and any material limitations relevant to the application. | Written material specification and, where needed, a material test report for the supplied sample or production lot. | Check that documents identify the tested material and correspond to the item being quoted. Do not treat appearance alone as proof of material composition. |
| Load performance | Rated load and the conditions behind the rating, including loading direction, test surface, temperature, duration, and installation method. | Test procedure, results, sample details, and any stated limits or safety factors. | Compare suppliers only when test conditions are comparable. Conduct your own pull and shear tests on the intended furniture surface; a single load figure without conditions is difficult to assess. |
| Retention over time | Ability to remain attached during the expected use period and under the intended temperature and humidity conditions. | Retention or aging test data, including the test duration, environment, surface type, and acceptance criteria. | Run a practical hold test using the intended installation and load. Record any detachment, slipping, deformation, or loss of suction. |
| Surface compatibility | Performance on the specific finish, such as glass, glazed tile, or smooth coated furniture surfaces. Porous, textured, dirty, or uneven surfaces may not form a reliable seal. | Documented test results for relevant surface types and installation instructions. | Test on representative finished surfaces, not only on a smooth laboratory plate. Follow the same cleaning and fitting steps for each sample. |
| Manufacturing consistency | Control of dimensions, molding appearance, flash, tears, bubbles, and other defects that may affect sealing or fit. | Inspection criteria, sample inspection records, and the supplier’s process for controlling nonconforming parts. | Inspect multiple samples from a production batch and compare key dimensions and visible condition against the approved sample. |
| Quality management | Documented procedures for incoming materials, production checks, final inspection, traceability, and corrective actions. | Relevant quality-system documentation and examples of inspection or traceability records. | Confirm the scope and validity of any management-system certificate with its issuer or certification body. A quality-system certificate does not by itself prove product performance. |
| Compliance documentation | Requirements applicable to the product, destination market, and intended use, including any customer-specific chemical or material restrictions. | Applicable declarations, test reports, or other supporting documents that identify the product or material covered. | Check document dates, test scope, issuing laboratory, and match to the quoted item. Request independent testing when required by your market or risk assessment. |
| Sampling and order terms | Sample availability, tooling or customization terms, minimum order quantity, lead time, packaging, and the process for approving production samples. | Written quotation, sample terms, agreed specification, and a documented sample-approval process. | Ensure the approved sample and specification are referenced in the purchase order. Confirm how changes to materials, dimensions, or production sites will be communicated. |
| Packaging and shipping protection | Protection against dust, deformation, contamination, and damage during storage and transit. | Packaging specification and photographs or samples of the proposed packaging. | Inspect packed samples after transit and check that the cups remain clean, correctly shaped, and ready for installation. |