Add to cart Harrell Muzzle Tuner Silver Price $160.00 Add to cart Harrell Tuner Bloop Tube Silver Price $35.00 Aluminum Body Sorbothane rubber Reduces Vibrations Stiffens Barrel Improves Performance of your Rifle Weighs 6.5oz Length 3.5" Works Best on barrel diameter of .850"-.950" For barrels under .900" diameter, ask for the thicker rubber