Sold in packs of 10.

HMX's PC top housing is nothing like your regular PC top housings. Due to its characteristic, PC top housing usually makes the top-out sounds friable and loose; HMX made modifications to the touch point where the stem hits the top housing and reduced such unpleasant sound. As a result, the top-out sounds concentrated and solid. The modified PA66 bottom housing does come with some fiberglass added to it but not too much. The purpose is to make the bottom-out sound as solid as possible without making it the clackiest bottom-out ever. When paired with the LY stem, each keystroke will sound solid and clacky.