High-quality 2-1.25' Flat Top Adapter with Brass Clamp Ring by Tele Vue Constructed from durable black anodized aluminum for long-lasting use Flat-top design allows for closer placement of the eyepiece Compatible with Newtonian reflectors, Tele Vue Paracorr, 2' Powermate, and 2' Big Barlow Features a brass clamp ring for a secure and stable hold of the eyepiece Designed to accommodate a 1.25-inch barrel eyepiece on a 2-inch focuser telescope or microscope