This is a generic version of Orion’s Lasermate Collimator. I have used this item many times, before selling my reflector. This item fits 1.25 diameter fittings. Currently, the laser is collimated, but collimation screws are present on the housing should they be needed. Orion sells theirs for $55.00. I’m selling mine for $40.00. PayPal Preferred. Shipping $3.00 in mainland US.