Geniune OEM Clutch Drum Spur Sprocket Needle Bearing For Echo Chainsaw Replaces Echo PN:17500539133 17500539131 17500539132 V555000170 Oregon 106906x Warning! Please confirm your Original parts size , model number ,serial number before purchase! Size: Spur Pitch:3/8" Teeth:6 Total Height: 23mm Hole ID :13Φ Drum ID :60Φ Needle Bearing: 10 x 13 x10mm Fits For Echo CS-3000 Chainsaw Echo CS-300 Chainsaw Echo CS-301 Chainsaw Echo CS-303T Chainsaw Echo CS-305 Chainsaw Echo CS-306 Chainsaw Echo CS-330MX4 Chainsaw Echo CS-330T Chainsaw Echo CS-340 Chainsaw Echo CS-3400 Chainsaw Echo CS-341 Chainsaw Echo CS-345 Chainsaw Echo CS-3450 Chainsaw Echo CS-346 Chainsaw Echo CS-3500 Chainsaw Echo CS-350TES Chainsaw Echo CS-350WES Chainsaw Echo CS-351WES Chainsaw Echo CS-355T Chainsaw Echo CS-360T Chainsaw Echo CS-360TES Chainsaw Echo CS-361P Chainsaw Package:1 x Clutch Drum 1 x Needle Bearing