Premium manufacturer front sprocket, rear sprocket and a precut Regina chain make a convenient kit for the dealer or consumerSprockets are made of high-quality steel and have OEM gearing520 ZRE Drive ChainNew, high-performance ZR chains with new patented Z44 seal Z-ring sectionsZ-ring flexes when assembled, creating a spring effect that guarantees seal will not diminish over timeZ-ring section also provides enhanced chain flexibilityFeatures high alloy steel plates and pins, solid bushings and rollers and shot-peened plates, pins and rollersPre-stretched to enhance performanceClip type and rivet type links includedGold color