4.5" primary and matching secondary (with holder and spider) from a Celestron Cometron reflector. Optics are in good condition, but have some very fine sleaks (noticeable only under bright light) from someone's cleaning job. Will be fully functional though and shouldn't need recoating. Primary also comes with cell, though this will need to be mounted in some sort of ring for your scope. $50 shipped or will trade towards interesting eps, guide scope rings, a C8 accessory bar, a Kendrick controller and/or heaters, dob parts. Cheers!