| Brand | Newport |
| Model | Reference optical flat |
| MPN | Optical flat |
| Country Of Origin | United States |
Newport 4" Double Surface Optical Flat, Master Grade 0.000002" L/15 Flatness, Fused Silica. Surface quality: Mil spec 10-5. Surface flatness: master grade 0.000002" (L/15). Material: Fused Silica. in Original Plastic Storage Box.