Optical Windows and Mirrors, lot of 4, damaged

This item is a lot of four optical mirrors and windows. These optics will need to be resurfaced – selling as parts.
Descriptions:
– Optical mirror: 3.4″ diameter, 0.93″ thick, metallic coating, flat, surface is severely scratched
– Optical window: 2″ diameter, 1.6″ thick, flat, both surfaces are scratched, edges have small chips
– Optical window: 4″ diameter, 0.8″ thick, flat, surface is severely scratched from improper cleaning
– Optical mirror: 3.7″ diameter, 0.46″ thick, concave, surface is severly scratched
***MPN
***OEM
***SKU*** 37468