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
GSO 1.25" Newtonian Deluxe Laser Collimator III
NEEWER LS-T9 Red Laser Collimator - NEEWER – neewer.com
Orion LaserMate Deluxe II Laser Collimator
About collimating laser collimators - Reflectors - Cloudy Nights
Amazon.com : NEEWER Red Laser Collimator, Adjustable 1.25" Collimation Eyepiece with 2" Adapter, Telescope Accessory Compatible with Newtonian Dobsonian Marca Reflector Telescope, LS-T9 : Electronics