Anti-static and low residue: the adhesive pen and adhesive provide electrostatic discharge control, the adhesive head is soft and elastic, good absorption, no wire drawing, no glue residue, and will not leave scratches on the lens sensor. Excellent for "spot" cleaning a camera sensor. | High quality degradable paper material: durable material, synthetic resin anti-slip design, increase the friction with the optical lens to be cleaned, sensor surface, cleaning effect is better. | This product is non-toxic, environmentally friendly and has passed ROHS environmental protection testing. Size: each sticky cotton swab is about. 2.5 mm /0.1 inch in diameter and 75 mm /2.95 inch in length. | Anti-static glue sticks are designed for cleaning a variety of electronic instruments and precision optical devices, including wafer and semiconductor components, LED/LCD surfaces, glass lenses, specular reflection microscopes, camera sensors, hard drives and tiny, hard-to-reach areas. Clean (Class 10-5000 clean room) LED/LCD surface particles and dust and debris generated during the computer chip photolithography process. | Satisfaction Guaranteed: Backed by our 90-day satisfaction guarantee for peace of mind.