Plain Base Circle Discs.

Features:

• Manufacturing Range : 5 mm to 200 mm.
• Material : OHNS , En 31 Alloy steel.
• Are ground and precision lapped after a heat treatment process which includes subzero stabilization cycle to ensure dimensional stability.
• Calibration under standard room temperature at 20 degree  celsius on carl zeiss,Horizontal Metro scope which is traceable to National Standards.