The All Balls CV Boot material is compounded from an OEM grade DCR66 rubber that is formulated specifically for the demanding requirements of today’s ATVs and UTVs. 40% higher tensile strength than conventional CV boo material, suitable for the high joint angles of modern ATVs and UTVs. 50% more abrasion-resistant than conventional CV boot material to ensure a long life in harsh off-road environments. Rubber compound is tested to -40° F to ensure good performance and long life at low temperatures. Lithium-based Molybdenum Grease insures good lubrication for long CV joint life. Easier to install than most OEM and aftermarket boots. Sold each. Does not require the use of a ""Banding Tool"". Specifications: H: 104.5mm SD: 21mmLD: 67mm Shaft I.D.: 21 CV Body I.D.: 67 Length: 104.5 Kits include: Two stainless st clamps that are designed to be tightened without the use of special tools.