【Compatible With】 STIHL 017, 018, 021, 023, 025, MS170, MS180, MS210, MS230, MS250 series. Let your chainsaw run like new. 【Package Includes】 1 x sprocket, 1 x clutch, 1 x sprocket bearing, 1 x worm gear, 1 x washer, 1 x E-clip, 1 x spark plug. Installation and replacement work will be quick and easy. 【Perfect Match】 Each replacement part will perfectly match the original one. The high-quality sprocket kit helps you easily repair the chainsaw and bring it back to peak performance.