This advert is for a complete set of x11 1/4 in (6.3mm) JackCap Dust Plugs to fit your Korg Kronos 1/ 2 or 3 Keyboard which has x11 6.3mm (1/4in) Input / Output jack audio sockets on the rear, 
You will receive a full set of 11 JackCaps in one colour or you can specifically ask for a personal choice of mixed colours in the notes during checkout. Jackcaps come loose in any quantity you desire, the picture of the retail packaging box is AI Generated and not included. 
They are a soft silicon robber plug created with a snug fit that will help to keep out dust and fluid from entering your machine keeping the insides as good as new when you come to use them.