Why Dailywell MPB series switch dimension is different from the SPEC?

Why Dailywell MPB series switch dimension is different from the SPEC?

The common of Dailywell MPB series are MPB 19~25 and MPB 16. For example MPB19, 19 is meaning of holes size, if the upper cap size is 22mm. The whole series is following this design rule. Moreover, The production line of MPB19~25, the lockable or un-lockable is pushbutton size(including identity length/actuator length/the button length) as same. However, the series of MPB16 is divided of MPB16 and MPB16L, the identity length is different from the button length.

Press Release