Troy-Bilt TB25SB 25cc 2-Cycle Straight Shaft Gas String Trimmer. This lightweight trimmer features a dual-line bump head with .095" line for precise cutting. SpringAssist technology ensures easier pull starts, while the multi-position adjustable handle reduces vibration and operator fatigue. Its 16" cutting swath offers efficient and effective trimming, reaching easily under shrubs, around fence posts, and other obstacles. Includes 2-cycle engine oil and backed by a 2-year limited warranty. For replacement spool, use TV# 177123.