Lehr, 17", LP, Detachable, Curved Shaft String Trimmer, 25CC, 4 Cycle Engine, Runs Strictly On Propane Fuel Only, Uses 16 OZ LPG Propane Bottle, Accepts Most Universal Attachments Other Than Echo Brand, 17" Cutting Swath, .080" Line Diameter, No Choke, Priming Or Gas Involved, Easier To Fuel, Start, Maintain & Store Compared To Traditional Gas Powered String Trimmers, Eco-Friendly, Less Expensive To Operate, Less Maintenance & Extended Engine Life.