Product Description The tension wheel with short height is installed on the short arm, and the tension wheel with high height is installed on the long arm. Increase riding safety. Made of lightweight aluminum alloy and stainless steel, durable and practical, not easy to be out of shape. Features- Material: Aluminum alloy and stainless steel. - Size: Approx. 4. 00X2. 55X4. 00cm/ 1. 57X1. 00X1. 57in. - Hollow design reduces weight and makes riding smoother and easier. - easy to install, a great accessory for your bicycle. - With bright colors and luster, smooth lines, smooth edges, making your bike more cool and fashion. - Smooth lines and colorful design reject monotony. - The product is made of aluminum alloy, which is durable, corrosion- resistant and has higher hardness. Package Including 1 x set of tension wheels