It is an easy upgrade to the optical finders that are usually found on 4.5" and 6" reflectors and many refractors as it is a straight replacement, using the same two protruding studs. The holes on the base of the finder are slotted so that they will fit from 21mm to 26mm across.
Specification Material: Metal +
Plastic Color: Black
Net Weight: 72g/ 2.52 oz
Package Includes: 1 x Red Dot Finder Scope 1 x Mounting Bracket Base 1 x CR2032 Button Battery