Chain & Sprocket Kit Contents: 15T Front Sprocket - SPF27015C 37T Rear Sprocket - SPR446237C 106 Link RK Chain - RKP420MRUX106 RK Kit Box - SPRKITBOX RK chain and sprocket kits are the perfect drive maintenance kit for your bike, including a strong and durable 15T front and 37T rear steel sprocket, constructed from SCM420 chromoly steel alloy (front) & C45 high carbon steel with a electroplated Zinc finish (rear) paired with a high-quality U-ring RK chain this kit has everything you need to replace your old warped and stretched chain and sprockets. The perfect alternative to expensive OEM replacements while designed to meet and exceed OEM specifications. Supplied in presentable packaging with a carry handle for convenient transportation. About the Chain: Featuring RK's Ultra Thin Seal technology, the seal thickness of the MRU series U-rings are less than 50% of the common seal. Making it possible to design a sealed chain with the weight of a non-sealed chain. You can expect up to 4 times longer chain life than a non-sealed 420 equivalent chain, with minimal to no weight increase. Fits: Honda NBC110 2013-2020