The Denis Wick Replacement Cornet/Trumpet Mute Corks make it easy to keep your mute in working order. You get three corks in the pack each made to fit the compatible Denis Wick straight mutes listed below. If your existing cork is worn down or starting to come loose this is a straightforward fix. Theres no need to replace the whole mute - just swap the cork and carry on playing with the mute you already know and trust. Theyre small affordable and handy to keep in your case as a spare.