Product model table
(Find the product number of the product you want in the form, and select the product number from the above options to purchase.）
| Material | BK7, Fuses Silica, LaSFN9 |
| Diameter Tolerance | +0/-0.005mm |
| Sphericity | <0.003mm |
| Surface Quality | 60/40 scratch and dig |
| Clear Aperture | >90% |
| Coating | None, available |
