SPR67 – Akko’s new spring mount barebone, and is also Akko’s first experience on flex-cut ENIG PCB. The plate of SPR67 is exclusively supported by springs, that you can select to adjust the flexibility. Akko provides 3 sets of springs with different forces so that you can make it stiff or flex by your own. Specification ENIG Flex-Cut South-facing PCB (no LED) FR4 / POM Plate; 5-pin Hot-swappable Springs: 120g, 170g, 230g (7pcs each) Wired Connection through USB-C.