Speed Silver - Linear 1.2mm Pre-Travel 3.6mm travel 45g Actuation Pre Lubed For Hot Swap Mechanical Gaming Keyboards & DIY Custom Keyboards. Linear: for fast, responsive gaming ; used by some of the world's best gamers PCB mounted switches ; High compatibility 5-pin design SMD LED Compatible Switch Remover / Puller Included! Professional competition grade, Pre-lubed for a perfect and smooth actuation Bottom Housing: POM ; Top Housing: PC ; Stem: POM ; Contact: Composite Gold ; Stainless Steel Spring