General description You are buying a set of 5 sprocket rims designed for chainsaws. These aftermarket parts are compatible with various Stihl and Husqvarna models, specifically for those with a 19mm inner hole. Technical specifications Pitch: 3/8" Teeth: 7 Inner hole diameter: 19mm Replacement for Oregon OEM: 18720 Replacement for Stihl part number: 000 642 1249 Compatibility and accessories Compatible with Stihl models: MS360, MS310, MS290, 034, 036, 028, 029 Not suitable for 17mm inner hole Usage These sprocket rims are used as replacement parts for compatible chainsaws, ensuring smooth operation and performance.