[Design]: Exercise Bike Resistance Knob compatible with most exercise bikes. [Material]: Made of plastic and metal, durable and functional. [Feature]: Compact and portable design; smooth surface prevents hand scratching during use. [Easy to Install]: Simple to install and use, saving time and effort. [Applications]: Suitable for a wide range of strength and fitness equipment, including exercise bikes. Type: 10 Gears Color: Black Material: Plastic Package Contents: 1 x Exercise Bike Resistance Knob Note: Light reflection and different display settings may cause slight color variation between the image and the actual item. Measurement error allowed is +/- 1-3 cm. Due to lighting and screen settings, the item's color may differ slightly from the pictures. Please allow minor dimensional differences due to manual measurement. Sold by YJL official store