Akko Silver Pro has upgraded the regular CS Silver to 5-pin with dustproof structure, with additional lubes on the rails, providing better out-of-box experiences. Akko V3 Silver Pro Type: Linear Operating Force: 40gf ± 5gf Total Travel: 3.3mm Pre-Travel: 1.0 ± 0.5mm Tactile Position:N/A Tactile Force: N/A