This universal ball-shaped knob is great for replacing worn-out joystick tops or adding a to your arcade machine. Simply unscrew the old knob and screw on the new one for an instant upgrade. Ideal for arcade enthusiasts, gamers, and DIY hobbyists, this knob ensures a comfortable grip and precise control during intense gaming sessions. Features -Color:Black -Material:Plastic Copper -Size:3.20X3.20X3.20cm/1.26X1.26X1.26in -Universal compatibility: this ballshaped knob is designed to fit various joysticks and controllers, making it a versatile replacement part for multiple devices -Comfortable grip: the ergonomic design ensures a comfortable grip, enhancing your gaming or operational experience by providing better control and precision -Durable material: made from plastic and copper materials, this knob is built to withstand longterm use without significant wear and tear, ensuring longevity -Easy installation: the knob features a simple installation process, allowing you to replace your old knob quickly and effortlessly without any special tools -8 mm thread fit: specifically designed to fit 8 mm diameter threads, this knob is great for a wide range of applications, ensuring a secure and stable attachment Package list: 2 pcs x 1 handle ball