All Balls 19-5021 Black 21mm x 67mm x 104.5mm Long CV Boot Kit 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 ATV's & UTV's 50% More abrasion resistant than conventional CV boot material to assure long life in today's harsh off-road environments Rubber compound is tested to -40 degrees F to assure good performance & long life at low temperatures Kits include two stainless steel clamps that are designed to be tightened without the use of special tools Lithium based Molybdenum grease insures good lubrication for long CV joint life