uxcell 20 Pcs Black Rubber Treadmill Motor Driving Belt Assortment Kit Product Name : Motor Driving Belt;Top Width : Maximum: 1.5mm / 0.06";Minimum: 1mm / 0.04" : Minimum: 1mm / 0.04" Height : Maximum: 1.5mm / 0.06";Minimum: 1mm / 0.04" : Minimum: 1mm / 0.04";Inner Girth : Maximum: 126mm / 5" Minimum: 63mm / 2.5" : Minimum: 63mm / 2.5";Inner Dia : Maximum: 40mm / 1.6";Minimum:20mm / 0.8" : Minimum:20mm / 0.8" Material : Rubber, Polyester;Color : Black Weight : 4g;Package Content : 20 x Motor Driving Belt