Material: Silicone Size: 40mm*30mm*20mm/1.57*1.18*0.78" Inner width: 2mm Thickness: 15mm Net weight: 199 Gross weight: 199 Uses:protect the crank sprocket Color: blackyellowpinkwhiteredgreenblue Note: Please allow 1-3mm differs due to manual measurement. Due to the different display and different lightthe picture may not show the actual color of the for your understanding.