Low Scope Ring Mount 30 MM Matte Black by Golden Eye Tactical Aluminum construction,matte black finish Ring mount fits picatiny/weaver rails, fit 30 mm tube. Nut allow fast installation & detachment and tight Low profile, ring saddle Height : 0.38 inch. Rings easily mount around the scope with socket cap 4 screws and this ring designed for nice installing in an unusual position shipped promptly the product