Accessories For Optical Benches-Cross Slits With Arrowhead

The Following Accessories Are Available Optiolly For Use With Optical Benches As Per Cat. Nos. 1110920 Are Provided With Metal Support Rods For Their Vertical Mounting In The Riders. The Sizes Of The Components And Lengths Of The Respective Mounting Rods Have Been Designed To Provide A Common Optical Center. (Cross Slits With Arrowhead Four Arrow Head Slits Intersecting At A Common Point To Project The Arrow Head Images.)