sunstar sprocks ketting ss520rdg 100r ss520rdg 100nRoad Dual Guard Heavy Duty Sealed Chains For Street Motorcycles, Dual Guard Sealed Ring Is Similar In X Shaped Rings As It Utilizes 2 Sealing Lips and Lubrication Pools Per Side Of The Ring Versus The One Side, Single Lip Design of A Standard O Ring While Also Helping Achieve Less Friction, Great All Around Use Road Chain Available for Just About Every Application on the Street, Comes in the Natural Color, Type Type Connecting Link, Tensile Strength