Sold in packs of 10. With a brand new all-black spring, improved top housing material and cushioned top housing rail, this switch is going to be a game-changer! Improvements over previous Obsidians The bottom of the new mould is slotted, SMD lights are supported, and there is a fixed spring protrusion in the bottom housing The top housing is made of a new black transparent material. The centre slide rail inside the top housing is cushioned, which makes the spring rebound more comfortable Improved all-black Obsidian spring Specfications: Manufacturer: JWK (Designed by 43 studio) Switch type: Linear Factory lube: Shaft and feet are slightly lubricated Mounting Type: PCB Mount (5-pin) Top: Black transparent composite material (different from the previous all-black Obsidian and milk shell Obsidian) Bottom: Nylon Stem: POM Spring: Thic Thock DL Series V2 black spring (improved version of all black Obsidian) Actuation: 50g Bottom Out: 62g SMD LED compatible