Ryobi 17-Inch 31cc Gas-Powered String Trimmer with Straight Shaft 765R 17-inch gas string trimmer with a 31 cc 2-cycle engine Pro-Style Straight Shaft allows for easy trimming under shrubs and low branches Dual piston rings result in lower emissions, better performance, and longer engine life Bump head line release with 17-inch cutting swath and .080 diameter single line Non-CARB Compliant/Not For Sale In California