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Akko CS Switch Series. Akko Custom Series (CS) switches are 3-pin custom switches made for DIY enthusiasts to obtain satisfying typing feelings with more affordable options.. Built-in LED Slot. Akko CS Jelly White switches are equipped with LED slot ready for LED Mod/Assembly, and are SMD compatible (LED underneath the switch).. Specification. Type: Linear. Operating Force: 35gf ± 5gf. Total Travel: 4.0 ± 0.3mm. Pre-Travel: 1.9 ± 0.3mm. Spring: 22mm Extension. Compatibility. Akko CS Jelly White switches come with MX style structure so they would fit most keycap sets with (X) cross stem. Note: switch opener is not included.