This 6"" (152mm) Bolt style grooved end pipe coupling is made of cast 304 stainless steel and supplied with a 6"" nitrile buna grooved end pipe coupling gasket. It is rated for pressures up to 1000 psi and is a simple style of coupling that is designed with cross-ribbed construction to provide a strong component for pressure piping systems. It is supplied in a two piece housing design with securing bolts and nuts. These couplings are built to withstand harsh environments for long periods of time, but they should be inspected periodically and replaced when needed.