Manufacturer Seimitsu is well known for the PS series pushbutton, whose microswitch differentiates itself by requiring just a bit more force to actuate. The MM9-3 spring adds a bit of extra tension to Seimitsu's 30mm pushbutton series. This is desirable to some who appreciate a slightly more deliberate input force and a bit less sensitivity than Sanwa's SW-68 offers.
Adds .15N for Total of 1.13N (0.2548 LBF)
By default, Seimitsu microswitch requires 1.0N or 0.2 LBF (pounds force) to each button. The MM9-3 adds .15N, for a total of 0.258 LBF. The result is a light but firm button input requirement and quicker return to neutral.
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