APM Telescopes. TS Optics Laser collimator for Newtonians with 1.25" barrel
NEEWER LS-T9 Red Laser Collimator - NEEWER – neewer.com
Bresser Laser Collimator 1.25´´ 31.7Mm Black | Trekkinn
Amazon.com : Astromania Alignment 1.25" Next Generation Laser Collimator for Newtonian Telescopes - with This Laser You can collimate Your Newtonian Telescope in just a Few Minutes! : Electronics
1.25" SCA Laser Collimator for Newtonian Telescope