Economy 2-1/2" (62.5mm) prism are hermetically sealed to prevent loss of range or accuracy due to contamination. Fits any prism holder with a 5/8" x 11 female thread.
Sokkia Economy Prism (Silver Coated)
Sokkia
Sokkia Economy Silver Coated Precision Prism in Canister.
Sokkia Part Number: 724802