Purchase Notes:The size of the triangle belt is divided into metric and imperial systems1. The size of the metric formula is increased by way of 0.5 meters, such as: A-500, A-550 ..... A-3500, A-3550 (the same applies to B belt/C belt/D belt).2. Inch size 1 inch = 0.254 meters in increments, such as: A-20, A-21, A-22...A-80, A-81 (same for B belt/C belt/D belt) .3. Convert from imperial formula to metric formula components (Note: the conversion formulation will have a slight error)A Type : (Model-1) *25.4=Metric length, B Type: (Model-2)*25.4=Metric lengthProduct Description:Name: V-beltMaterial: High-strength polyester rubberTypes: A TypeSize:Width 13mm,Thickness 8mmTorque: 3500r/ minPower: 25N/MTemperature: 75°CFeatures: comfortable transmission and coffee noise ,good put on resistance, stable frictionStop condition: The pattern belt stops working when it reaches the set value of 4% slip rate.Uses: extensively utilized in automobiles, industries, family appliances, agricultural equipment, etc.Package Include:According on your Choose !