Cleaning foam swab is constructed from compressed polyurethane foam securely bonded to a 100% polypropylene shaft that is free from organic contaminants such as silicone, amides or phthalate esters.1.It doesn’t leave the residue behind stuff like regular cotton swabs do. Not falls off, stays together perfectly.2.Cleanroom Foam Q Tips are more suitable for deeper cleaning of articles with high cleanliness requirements. Competent as gun/firearm swabs, camera sensor swabs, optical lens swabs, printer swabs, PCB swabs, microscopes swabs, electronics swabs, jewelry swabs, arts&crafts swabs, ect.Features :-High quality, Lint-Free & Fiber Free.-Soft and non-abrasive tip.-Free from silicone, amide and DOP.-Low non-volatile residue.-Low in both particles and ion content.-Excellent solvent-holding capacity.-Compatible with most common solvents.-No contaminating adhesives or coatings.-Washable and reusable.-Foam securely thermally bonded to a polystyrene shaft, refuse to fall off.-Polyproylene handle provides good control and excellent balance of flexibility, refuse to break.Applications:-Micro-mechanical cleaning.-laboratory optical equipmen cleaning.-Used in the cleaning static sensitive components or parts.-Remove flux residue and excess material.-Effectively clean small slotted,recessed and hard to reach areas.-Used in the electronics, semiconductor, hard disk drive, Optics-electronic, LCD,PCB,SMT, IC and biotech industries.-General purpose cleaning.Package: 100Pcs