Safety Swabs from TubeMaster are designed to improve safety when cleaning tubes. Traditional swabs used for cleaning tubes are made from untreated polyurethane foam, which poses safety risks due to its flammability and toxicity if burned. Safety Swabs are treated so that the foam meets Underwriters Laboratories standards and will not support combustion or continue burning once the ignition source is removed. Safety Swabs come in different shapes and sizes and can be used with TubeMaster's PigMaster system to automatically blow down pigs and confirm they have cleared tubes.