Our fitness equipment ball knob is designed to fit a wide range of exercise bikes, making it a versatile replacement part. The ball-shaped rotating design allows for effortless resistance adjustment, ensuring a smooth workout experience. Crafted with precision, the surface is smooth and without burrs, providing a comfortable grip. Installation is straightforward, with easy-to-follow steps that make the process quick and convenient. The pull pin ensures accurate positioning, enhancing the functionality of your exercise bike. Features -Color:Black -Material:Iron -Size:6.30X5.30X5.30cm/2.48X2.08X2.08in -Screw: M16x22 -Topper Diameter: 8mm -Must-Have Knob: This versatile accessory is designed to be compatible with a wide range of exercise bike brands, making it a must-have for fitness enthusiasts -Rotating Mechanism: Featuring a ball-shaped rotating mechanism, this knob allows users to effortlessly adjust resistance levels during their workout sessions -Comfortable Grip: Crafted with precision, the knob boasts a smooth surface, ensuring a comfortable grip and exceptional durability over time -Straightforward Installation: The installation process is straightforward, with easy-to-follow steps that make setting up the knob -Precise Positioning: Equipped with suitable diameter pull pin at the top, this knob ensures precise positioning, enhancing the overall performance of your exercise bike Package list: 1 x Pull Pin Knob