Specification:
Material Of Prism : K9
Diameter Of Prism: 25.4mm(1")
Water And Dust Proof: YES (O ring)
Angle Deviation: 5 arc sec.
Coating: silver coated +black paint
Size Of Screw: M25x1.25 and M6x1
Fits ADS102 Mini prism system (ADS102A and ADS102B etc..)
the back of prism (GLASS) electroplate Silver coated. Have more better quality .
Replacement prism glass and can for most popular mini 'peanut' prisms sets.
FEATURES: 25.4mm diameter prism, in black can.
Improved threaded can and ring with special "O" ring for sealing Can's point permits measurement of corners (offset 0mm)
there have two screw. the small one about M6 . The big one about M25
Brand New And High Quality