BK-7, GR A, 50.8MM Ø X 9.525MM TK - PLANO/PLANO, S/D:40/20, FLATNESS:λ/4, C.A.=80%

BK-7, GR A, 50.8mm Ø X 9.525mm TK
Material: BK-7, Grade A
Diameter: 50.8mm +0.00/-.1mm
Thickness: 9.525mm ±.5mm
Plano/Plano Substrate
Specs both sides:
-Surface Quality: 40/20
-Flatness: 1/4 wave
-C.A. = 80%
All edges and bevels commerial polish
Wedge: 2 minute