1.25 Inch Red Laser Collimator & 2 Inch Adapter for Newtonian and SCT Telescope
Weight(collimator): 82g/ 2.8oz. Weight(adapter): 53g/ 1.8oz. Wavelength 635-655nm and less than 5mW output power for safe use. Adjust the sealed screws for easy collimation. Size: 103.4 31.7mm/ 4.0 1.2in.