520 RT Chain And Sprocket KitPremium 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 RT Drive ChainThere chains ensure high mileage with reduced elogationAssembled with solid bushings and rollers, shortpeening of platespins and rollers to increase the fatigue resistanceSubmitted to performance-enhancing pre-stretching 520 RT Chain And Sprocket Kit Regina /12300390/