A Zerust® ICT® Tube and Barrel Strip is a narrow tube that is made with proprietary Zerust® ICT® formulations to protect narrow diameter ferrous metal tubes and pipes from corrosion. Zerust® ICT® Tube Strips can be cut to any length to meet specific corrosion protection needs. Zerust® ICT® Tube Strips are ready-to-use and installation is easy - simply insert the length of the Zerust® ICT® Tube Strip inside a ferrous tube or pipe, and cap the ends of pipe. Zerust® ICT® Tube Strips saturate the air inside of the pipe, protecting all interior surfaces from corrosion. Protected pipes are always ready to use. Simply uncap the pipes or tubes and remove the Zerust® ICT® Tube Strip. Zerust® ICT® Tube Strips are also perfect for protecting gun or rifle barrels. Tube Diameter: .250"