
【Compatible with】 For Husqvarna 345, 445, 445E, 450, 450E, 340 series chainsaws and more. 【Package includes】 1 x 0.325 inch rear sprocket (7 teeth), 1 x clutch, 1 x worm gear, 1 x needle bearing, 2 x clutch spring, 1 x oil pump. 【Easy to install】 The specifications of our replacement parts are exactly the same as the original parts. Replacement is quick and easy. 【Restore Performance】The brand new, high-quality clutch drum is very helpful for restoring the chainsaw's peak performance. 【Part Number】Sprocket: 578 09 79-01 503 93 18-01. Clutch: 537 11 05-03.