Technical Specifications Plate FR4 KBD8X MKII plate, top mount only Hotswap PCB Kailh hotswap sockets ESD, over-voltage, and over-current protection USB-C interface Compatible with QMK, VIA Configurator, and Remap AT90USB646-MU microcontroller ENIG surface finish Matte black solder mask 1.6 mm thick 6.25u bottom row: 7u bottom row: Gaskets PORON foam, 3.12 mm thick SKUF silicone feet Black silicone feet 3M adhesive 4 feet included per set