KSC-3051B Objective Lens Size: 64mm, Color: Bright Black Features: -Ring.-Suitable for 1" tube.-Packaged with base for TC, CVA, Traditions and MDM with flat receivers. Options: -Available for 32mm, 44mm, 52mm and 64mm objective lens sizes.-Available in Bright Black, Matte Black and Stainless colors. Specifications: -Come with 6-48 or 8-40 screws.