Legend headphones with interchangeable earbud kits are available in 3 sizes. Earbuds for Legend wireless Bluetooth headset earbuds BUD tip gel Buds tips eargel earbud earbuds Bluetooth earbuds Compatibility is only Legend. Soft silicone earplugs for a comfortable fit all day long. Your headphones stay fresh and comfortable for easy installation and replacement.Soft silicone foam Install and Replace Step one: Earkits knot snaps into earphone slots. Step two: the earbuds and then clockwise,locking. Unload otherwise. Colour:Black + transparent Material:Silicone + sponge Large size 15MM*10mm; medium size 14*9mm small size 12*9mm Package Contents: 2x large earplug 2x middle earplug 2x small earplug 6x sponge Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.