KBDfans Roller V2 Switches utilize 8-ball bearings that secure the stem movement by transitioning from a face-to-face to point-to-point contact. This results in a reduced friction during the keypress and minimizes stem wobble. KBDfans Roller V2 Switches Features: 18 included in each pack Linear Ball-Bearing Stems Top Housing: Transparent Ink PC Bottom Housing: PBT Stem: POM Pre-travel: 1.6±0.5mm Total Travel: 3.7±0.3mm Actuation: 42±10g Bottom-out: 58±10g PCB Mount, 5-Pin MX Structure Lubed Price: $0.38 per switch V2 Changes: Now more compatible with custom keycaps due to interference reported in the V1 Eliminates jamming issues caused by misalignment by simplifying the assembly process Updated leaf spring structure to reduce unwanted noises when paired with certain springs (note: it is recommended to not spring swap) Added light guide Includes: 18 KBDfans Roller V2 Switches