Bysameyee 1.25-inch telescope laser collimator calibrator

Easily align your telescope: Aligning your 1.25" (31.75 mm) and 2" (50.8 mm) reflector telescopes becomes easier, more precise, and saves you time. 1.25" (31.75 mm): Compatible with 1.25" (31.75 mm) focusers or diagonals thanks to the removable 2" (50.8 mm) adapter. Brightness Level 7: Collimated red laser beam with brightness level 7. Metal housing: For increased durability and optimal use. Battery: 1 CR2032 battery required (included).