THREAD SAVER® helps prevent serious valve thread damage that will disable your SCBA just when you need it most. It will save you money, as much as $275.00 to repair your damaged valve body. Thread protectors are needed for Survivair SCBA, Scott SCBA, Msa SCBA, ISI SCBA, Draeger, SCBA, Interspiro SCBA, Cairns SCBA and North SCBA. Fire fighters swear by THREAD SAVERS' ability to protect their soft aluminum cylinder valve threads. THREAD SAVER® provides protection by keeping dirt, dust, mud, grit, sand, snow, ice and water away from your LP or HP cylinder valve threads and valve orifice. THREAD SAVERS® are inexpensive insurance against serious valve thread damage and the need for costly valve repairs.