Oregon 72-001 Wheel 8-inch x 2-inch 1/2-inch 54 Tooth Drive Replaces AYP/Poulan 150340 193144 Replaces ECHO OEM # 130310-54130 Fits GT2000/SB, GT2400, SRM2400/SB and SRM2110 model trimmers. Fits PB2100 blower, ES2100, ES2000 and ES2400 vacuums, and SHC1500, 1600, 2000, 2400. Fits FHC1700 and 2100 hedge clippers. 2-5/8in x 2-5/8in ; 1/4in hole