Urethane steel cable construction. Oil, heat and abrasion-resistant. Metric timing belts are available in 5 mm and 10 mm pitch. They have steel tension members bonded to a urethane body. They are especially useful for chemically resistant operating requirements and for clean environments. For non-stock widths, Jason can cut specified widths from our supply of metric timing belt sleeves on special order. Maximum width is 300 mm. Metric timing belts are specified by belt width in millimeters, belt pitch, letter-number and pitch length in millimeters. For example: 20T10/900.