NEW Lot Of 2 Mika Metals Hybrid Sprockets, Fits KTM / Husky / GasGas Big Bike. 49T. This is sold as a lot. “Mika Metals Hybrid Sprockets are the ultimate application in lightweight long lasting sprockets. It's unique design means the majority of the sprocket is made from aerospace aluminum, while the teeth are made from hardened steel. This means you get the durability of a steel sprocket without all the weight. It is one of the longest lasting and lightest sprockets on the market.”