Get the click without the clack, plus a touch of ergonomic optimization, with a set of 50A O-Rings. To install the O-Rings, simply slide your keycaps off, pop the O-Rings into position, and slide the caps back on. Manufactured from industrial-grade rubber, your 50ShoreA O-rings won’t slip from position or crack with use, giving you a mechanical keyboard modification to last a lifetime.