[Design]: Exercise Bike Resistance Knob for most bikes and Exercise Bike.<br>[Material]: Made of plastic and metal material, durable and functional.<br>[Feature]: The knob small and portable, will not scratch your hands due to winding.<br>[Easy to install]: The knob is easy to use and quick to install, it will not take up too much time for you, and it is very convenient.<br>[Applications]: The Bike Knob Exercise Bike Accessory is widely suitable for strength and fitness equipment, , etc.<br>Type:10 Gears/8 Gears<br>Colour:Black<br>Material:Plastic<br>Package Contents:<br>1 * Exercise Bike Resistance Knob<br>Only the above package content, other products are not included.<br>Note: Light reflection 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.