Toppers can stay firmly with set screws, made of duraluminum Enlarged touchable surface, let your effect footboard work more efficiently Outer diameter 23.8mm; Inner diameter 10.4mm; Fits most universal Effects Pedal Switches with diameter less than 10.4mm Easier to see and hit with bigger . No sting to your feet. Let your pedalboard looks more beautiful the toppers on foorswitch and then tighten the set screws Colour:As Shown Material: Package Contents: 5 x Effect Pedal Protection Cap Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.