Forestone Mouthpiece Patch Black Small 0.4 mm for saxophone and clarinet mouthpieces, the revolution in bitepatches. A new high tech foil with adhesive surface structure will ensure excelent fit with no sliding and better haptic. It is biteproof and since we renounce of glue, it contains no dissolvents. And best, it is reusable. You can easily remove and reatche it.