Product parameters: Arc toothType: 8MPitch: 8mmMaterial: Neoprene Rubber With Fiberglass CoreWidth: 9-70mmShape: Closed-Loop Fiberglass Tensile Cord - High dimensional balance and most flexibility engineered and examined for extremely put on resistant performance; Nylon Tooth Cover - Durability and put on resistance, elevated energy capacity;Oil, heat and ozone resistance; excessive teeth shear resistance; Compound Chloroprene Rubber; Cord - Fiberglass; Tooth Cover - Nylon.Timing belt Efficient transmission, low noise, oil resistance, fatigue, inflexible, non-stretch, high precision, wear-resistant.The belts are widely used in automotive, textile, mechanical device tools, office machinery, strength tools, family appliances, instrumentation equipment, packaging equipment machinery, mining, petroleum, chemical and so on.