Switch Type: Linear Manufacturer: BSUN Designer: Xida Studio Stem material: New Y3 Top Housing: PC Bottom Housing: Modified PA66 Operating Force: 45g±5g Bottom-out Force: 51g±5g Pre-travel: 1.9mm Total Travel: 3.6mm Spring: 20mm single-stage nickel-plated spring Factory Lube: Yes. 205 and 105 mix on sliders. Dry film lube on the sliders of the stem and on the spring.