Shape is only one field
Blocking pad catalogs offer different outlines and openings. Record the actual drawing or dimensions for the proposed SKU. A round pad and a half-eye pad are not interchangeable merely because one listed dimension is similar.
| Specification | What to compare |
|---|---|
| Outline | Round, oval, half-eye or another supplier-defined shape |
| Dimensions | Diameter or both axes, with units |
| Opening | Hole profile, size and orientation where relevant |
| Interface | Block / chuck reference and supplier guidance |
| Packaging | Pads per roll, rolls per box and order unit |
Normalize quantity before price
If one quote is per roll and another is per box, convert both to the confirmed pad count. For example, a fictional box of two 500-pad rolls contains 1,000 pads; it is not comparable to an unspecified “1 box.” This arithmetic example is not a live supplier pack specification.
Approve the working outline
Request samples matching the quoted code and compare them with your block, lens shape and edging process. Record any overhang, placement difficulty or alignment issue observed during the agreed trial. Follow equipment and consumable supplier instructions rather than trimming or stacking layers without approval.
Keep pack-count changes visible on reorders. A familiar product name is not enough to confirm that the outline, opening and quantity are unchanged. Require a fresh drawing or sample when the offered specification differs.