Replacement cork for mutes can be used on most makes and models of straight and cup mutes. Made of black EVA foam. These will stick to wood, aluminum, carbon fiber, and more. Peel and stick backing doesn't require cement. Contoured backside design ensures excellent contact. Package of 3. EVA composition is flexible and crack resistant, plus helps eliminate squeaks when inserting the mute. - the manufacturer
Approximate Dimensions: 1.8 x 0.4 x 0.25 inches (46 x 10.2 x 6mm)