This kind of closed loop rubber timing belt has has strong anti-wear, good for power transmission, great for 3D printers and linear motion applications. Fit for Torque transmission and Light Load Conveyance The various of reinforce cord the running capability in the driving. Rubber closed loop timing belt has the reliable transmission and the fine size stability.This timing pulley has high quality shiny surface appearance and robust construction. Model: 142XL Belt Width: 10mm / 0.39 inch; Teeth Quantity: 71; Circumference: 370mm / 1.21ft; Pitch: 5.08mm / 0.2 inch; Belt Thickness: 2.3mm / 0.09 inch; Teeth Height: 1.27mm / 0.05 inch. Main Color: Black Shape: Closed Loop Material: Rubber Package Contents: 1 x Timing Belt Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.