Applicable models:For Husqvarna 445 445E, 450 450 Chainsaw Rancher Part Number: Diameter: 44mm Replace Part 544119802 544062001 525605001 Packing List: 1 piston kit 1 cylinder, 1 x needle bearing, 1 x bearing, 2 x oil seal, 1 x spark plug, 1 x decompression valve, 4 x gauge, 1 cylinder gasket kit Note If you have any problems in the purchase process, you can contact me at any time, we are online 24 hours a day, you are welcome to enter the store for consultation Warm tip: s 'please you can rate our products after you receive them, thank you for your support If you need to buy in bulk, you can contact me, I will give you an appropriate discount Applicable Models:For Husqvarna 445 445E, 450 450 Chainsaw Rancher Part Number: Diameter: 44mm Replace Part 544119802 544062001 525605001 List of Parts package: 1 x 1 cylinder piston kit, 1 x needle bearing, 1 x bearing