USE FOR PRINTERS & OPTICAL EQUIPMENT - SwabPro Foam Cleanings Swabs are made specifically for cleaning sensitive equipment such as printers, microscopes, electronics,optical sensors and safe for solvent print heads MULTIPLE USES -Cleaning foam swabs are also great to use around the house such as A/C vents and vents around your kitchen range FOAM SPONGE TIPS - Large lint free foam swab tips help to clean your devices. Add solvent to the foam tips to clean even deeper CLEANING SWABS - 100pcs large foam tip lint free swabs for cleaning guns, keyboards, inkjet print heads, sensors, optical equipment, cameras, keyboards and more.Our wellgler Foam Cleaning Swabs work as Alternatives to cotton swabs or other cleaners which leave lint Foam swabs construction：There are four layers of foam on the swab，（its good absorbency.）The inner layers attach to the plastic stick,while the outer foam wraps around to form a sandwich，It’s all heat-welded together, so there’s no worry about contamination from glue or other adhesives.