The 38040ESD Swabs Coventry Sealed Polyester ESD Swabs is an anti-static cleaning product used for the removal of dust, dirt, fog, and other contaminants from sensitive surfaces with minimal contamination risk. The swabs are made with a sealing lid and dipped in a special solution that offers low-particulate extractables. These swabs are constructed from ESD (electrostatic dissipative) foam material, which is environmentally safe and biodegradable. The soft, resilient foam head holds cleaning solution for optimal performance. It is also highly absorbent and leaves no residue. The swabs are manufactured by Chemtronics and are ideal for use in military, telecom, medical, aerospace, and semiconductor applications.