Feature:1. STURDY MATERIAL: The clutch is made of good quality steel material, plus 36T nylon gear, which is sturdy and practical2. GREAT REPLACEMENT: Kit includes 3pcs 36T nylon gear with bearing and 88mm clutch to replacement for motor metal solid gear3. USED FOR 500W750W MOTOR: Electric cycle accessories gear kit is suitable for 500W750W motor, mostly used for electric cycle wheel motor transmission motor spare parts4. HIGH STRENGTH AND GOOD TOUGHNESS: Motor gear clutch kit possess high mechanical strength, good toughness, and high reliability5. EXCELLENT PERFORMANCE: Motor gear clutch kit come with stable structure, excellent performance and long service lifeSpecification:Item Type: Electric Cycle Motor Gear Clutch KitMaterial: Steel + nylonNylon Tooth Belt Size: Outer Diameter: Approx. 47.5mm / 1.87in, Inner Diameter: Approx. 8mm / 0.31in, Thickness: Approx. 13.5mm / 0.53inClutch Size: Outer Diameter: Approx. 88mm / 3.46in, Inner Diameter: Approx. 15mm / 0.59in(manual measurement allowable error)Nylon Gear: 36TApplicable Motor: 500W-750WApplicable: for Right Rotation.Package List:1 x Electric Cycle Motor Gear Clutch KitNote:Pay attention to the size of the motor.Please verify that the product dimensions are the same before purchasing, and that they are the same in order to be used.