... CR or EPDM, PU or Kevlar cord, 743-20-30, pass 200 hours machine test motorcycle belts, scooter belts, 2 stroke engine ... beltsCR or EPDM, PU or Kevlar cord, 743-20-30,pass 200 hours machine testCharacteristics: auto parts1. High flexing capability2. Exact running ... -3000mm.7. scooter belt size: 669-18-28, 743-20-30, 788-18-30, 729-20-30, 735-20-30,842-20-30, etc.