• Stem: POM, MX stem • Top Housing: Proprietary Ink material, transparent housing • Bottom Housing: Nylon • Spring: Spring steel • Pre-lubed: Yes • LED Support: SMD • Pins:3-pin [SMD LED & Plug-in LED] Gateron phantom red keyboard switches is SMD LED compatible. And the top housing is translucent, bottom housing is a nylon type. 3-pin structure is much more versatile for the mechanical keyboards. This switch can be suitable for most mx mechanical keyboard. [Durability] Approximate lifespan of 50 million times of keystrokes based on laboratory durability test. Meanwhile, a single package box comes with 35 switches with a plastic tray that can securely house switches and can be served as a lubing station if necessary. So the switches will not shake for better performance. [Keyboard Switches] GATERON Phantom Blue Clicky Keyboard Switches – Gateron custom key switches clicky switches are 3 pin plate mounted custom key switches made for DIY enthusiasts to obtain satisfying typing feelings with more affordable options as they wish. [Keyboard Switches] GATERON Phantom Brown Tactile Keyboard Switches – Gateron custom key switches tactile switches are 3 pin plate mounted custom key switches made for DIY enthusiasts to obtain satisfying typing feelings with more affordable options as they wish.