The self-adhesive gel sticks to the surface of drums, cymbals, and most percussion instruments. The possibilities are endless, by simply moving the damper pad around the surface, you can eliminate any unwanted resonance, and obtain the exact sound the situation demands. They come in a pack of four and measure approximately 1 inch wide by 1-7/16 inches long. Great for live or studio applications! Since both live and studio situations can adversely effect your desired resonance, Moon Gels can be placed in various numbers and various places on your drum heads to achieve your desired goals. Moongel Damper Pads are 1"x1-1/2" squares of the famous Moongel silicone, which, when set directly on top of the drumhead, produce the perfect amount of ring control muffling. No adhesive is necessary, although squares will stay in place even when drums are played aggressively. (4 per package).