Trimmer Head Spool With Line / Echo 21500240Pack Size:1Echo 21500240, Echo 69621452730Mow More EC102565, NHC 207-2361Echo GT Echomatic 2 line, Echomatic head 99944200240, GT2000 and GT2400ID: 7/8 ", OD: 3 ", Height: 1 ", Fits our right hand dual line mini bump feed trimmer head, Includes .080" diameter trimme line