Troy-Bilt, 17", Split Boom, Curved Shaft, Gas String Trimmer, 29 cc, 4 Cycle Engine, Spring Assist Starting System, 17" Cutting Swath, Accepts Optional Attachments, Dual Line Bump Head With Speed Spool, .095" Diameter Line, Deluxe D-Handle, For Speedspool 2, #TB525ES Or EC, Replacement Cartridge Order Service Part #753-06149, 50 State/EPA Compliant, Electric Start Capable, 2 Year Limited Warranty.