Ipa snap swabs 4.5" self-saturated cleaning swabs applications lcomputer keyboards. Loptical and magnetic head devices. Lelectronic components. Lthermal printers (card printers, barcode printers, label printers, receipt printers) linkjet printers features & benefits l100 ppi, open cell polyurethane rectangular foam tip. Lnon abrasive. Lfoam is sealed directly onto the plastic handle without use of adhesive to make it moreenvironmental friendly. Leasy handling lexcellent for removing ink stains, adhesive residue , and debris on the print head. characteristics the plastic handle on the swab is filled with 99.9% ipa solution. Simply squeeze or snap the plastic handle and the foam head becomes saturated with just the right amount of cleaning solution. Clean the thermal print head by using a back & forth motion to effectively remove dirt and debris accumulated on the print head thus extending its life and maintaining a readable image.