SJMS 6*6 Tact Switch A101 Button Switch Round Caps Push Key Cap Size 4*7 inside diameter 3 / 3 100PCS Notice: this itme is only include the change cap ,but no longer consist of the swap inside hole 3 is suitable for 6*6 swap top 6-9(for height is above 10MM and straightforward to fall off) inner hole 3 is appropriate for 6*6 switch top 10-20mm(for top is above 21MM and simple to fall off)