Echo 2-Line Rapid Loader Trimmer Head. Replaces old part number X047001260. Maximum line capacity .130" trimmer line. Compatible with GT-225, GT225i, GT-225SF, GT-225L, SRM-225, SRM-225i, SRM-230, SRM-2620, SRM-2620T, SRM-266, SRM-280, SRM-280S, SRM-280T, SRM 225U, and SRM-280U. Standard line Dia. / Max Dia. 0.95” / .130." Check your owners manual to be sure 21560056 is the correct replacement part for your model.