Description: 2 inch to M42*0.75 adapter for Telescope Eyepiece. The inside of the adapter is fully threaded to minimize reflections. also had M48 threaded for filter. With T-ring, you can use M42 Lenses on camera.(T ring not include) At the end of the adapter is threaded to accept standard 2" filter. Made of full metal aluminum alloy. Specification: Material:Aluminum alloy Type:2 inch to M42*0.75 Adapter Male Thread: M42*0.75 Female Thread: M48*0.75 The Flange Thickness: 3mm Adapter Length: 31mm (Exclude Interface and the Flange) Color: Black Net Weight: 32.3g Package Includes: 1 Piece 2" to M42*0.75 Adapter