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. Ocean Blue 55gf Tactile Switch Ocean blue is a tactile switch with a high tactile position. Users shall start to feel the tactile bump at 0.5mm with a continued feedback all the way down to 1.8mm. It is thus different from conventional brown/blue switches that have medium tactile position. Built-in LED Slot Akko CS switches are equipped with north-facing LED slot ready for LED Mod/Assembly. It is also compatible with SMD LED. Durability - Approximate lifespan of 50 million times of keystrokes based on laboratory durability test. Compatibility Akko CS switches come with MX style structure so they would fit most keycap sets with (X) cross stem. Note: switch opener is not included.