OREGON 610729N.
They are economical with good wear resistance, have a one-piece design that must be replaced as a complete unit, and normal replacement schedule is every two chain loops. Chainsaw SpeedCut Nano Sprocket, Pro Spur 325LP 7T, for Husqvarna HVA 435.SpeedCut Nano sprockets are designed to work with 80TXL saw chain and TXLN guide bars as a system to optimize performance on electric and small gas chainsaws.