10 PACK - Heavy Duty Vibration Shock Absorption Dampening Rubber Balls For Camera Gimbals #9500 REDUCE VIBRATION - This help to reduce and isolate vibrations between the drone and camera QUALITY SILICONE - Made of high quality silicone for lasting performance COMPATIBLE WITH MANY DRONES - These work with the DJI Phantom, Blade 350 QX, Yuneec Q500 & many more DIMENSIONS: 20mm Height / 17.5mm Wide (At Widest Point) / 7.0mm Inside Diameter 10 PACK - This is for ten (10) dampening rubber balls