The Oregon 108215X Clutch Drum and Bearing assembly is a genuine replacement part designed for Husqvarna chainsaws. This essential component features a 0.325-inch pitch and 7-tooth sprocket, ensuring optimal power transfer and smooth operation. It replaces Husqvarna OEM part number 503980002 and is compatible with various models including 340, 345, 346, 350, 351, 353, 445, and 450. With an inner diameter of 66 mm, an outer diameter of 69 mm, and a height of 29 mm, this durable clutch drum and bearing weighs approximately 0.28 kg, providing reliable performance for demanding cutting tasks.