The ball suction pen and 7 suction cups of different sizes provide enough suction. Ease of use. The suction cup is made of soft anti-static ESD conductive silicone that 't scratch your lens or damage delicate parts, and stays clean to avoid fingerprints and smudges. Great for repairs and cleaning This kit includes a spherical lens suction cup pen and 7 suction cups of different diameters to fit most camera lenses. When taking out the lens with force, gently rub the pen with the suction cup to expel the air, then on the of the lens, lift it to the lens, and slowly put it in a suitable position., Weight: 0.10582188576 pounds, Manufacturer: puhae