EISCO Receiving Screen for Optical Bench – 100x75mm w/Graph Paper Screen

White metal frame, 100 x 75 mm with a graph paper screen White metal frame, 100 x 75 mm with a graph paper screen divided in mms.

Features

• Great accessory for rounding out the function of your optical bench
• 100x75mm with graph paper screen divided in millimeters
• Post is about 2.5″ tall and has about a 1/4″diameter