Oatey 180 Open Mesh Cloth features lightweight polyester/nylon and aluminum oxide abrasive designed for prepping copper pipe and fittings for soldering. Open Mesh Cloth can be used for cleaning, polishing and deburring copper pipe and fittings prior to soldering. Can be used with wet or dry piping and allows small particles to filter through the open mesh to minimize clogging Lightweight polyester/nylon.Designed for prepping copper pipe and fittings for soldering.Fully waterproof.