Amazon.com : SVBONY SV121 Red Laser Collimator, Adjustable 1.25 inch Collimation Eyepiece, with 2 inches Adapter, Telescope Accessory for Newtonian Dobsonian Marca Telescope : Electronics
APM Telescopes. Skywatcher - Laser Collimator
Telescope laser collimator, calibrator with adapter for Newtonian reflector telescope collimation,,F119745 - Walmart.com
New 1.25" Laser Collimator 2" Sleeve For Newtonian Reflector Telescopes Monoculars Astronomical Telescope Eyepiece Laser Adapt - Telescope - AliExpress
Astromania Alignment 1.25" Next Generation Laser Collimator for Newtonian Telescopes - With this laser you can collimate in just a few minutes!