The JWICK Ultimate Black is a 5 pin linear mechanical switch focusing on premium smoothness.This is made possible by utilizing a new JWK Mold. The switch also adopts a standard length spring, gold plated contact and can support SMD LED.Hope you like em! Do note that the switches are well factory lubricated and will not need much work on them unless you prefer to film them. Ultimate Black 58.5g switches are sold in packs of 31.Ultimate Black 63.5g switches are sold in last packs of 130. Top Housing: Polycarbonate Stem: POM Bottom Housing: Nylon PA66 Spring: 58.5g/63.5g, 15mm, Progressive Pre-travel: 2.0mm Total travel: 4.0mm Actuation Force: 45g/59g Bottom out: 58.5g/63.5g Long pole: No Factory lubrication: Yes Switch style: MX Style Opening with 5 pin Kindly note the following: By purchasing, you agree to our disclaimer for the purchase of mechanical switches.