Set of (4) 4lb Tension Springs 4lb tension springs make your joysticks feel firm and durable. Compatible with Arcade1up, Legends Ultimate, and Pandora's Box. Easy to install, refer to product images for step by step instructions. One thing Arcade1up got wrong are tension springs. Ditch the old 1lb springs which make your joystick feel cheap and flimsy. Our custom 4lb tension springs will make your joysticks feel firm and durable! Fits any Arcade1up Cabinet! Set of (4) 4LB tension springs options. Easy to install, Instructions available on images in steps.