BARSKA High Barrel Clamp Bipod Rail type: range of barrel size between 11mm to 19mm Adjustable height: 8"-11" Weight: 0.64 lb. Rubberized feet for maximum stability Strong and lightweight aluminum construction Strong and lightweight aluminum construction Rubberized feet for a more stabilized shooting position Barrel Clamp between 11mm to 19mm Maximum height: 10 Inches Minimum height: 8 Inches