Klo-Shure Insulation Couplings are for metric-sized polypropylene pipe systems. The Klo-Shure product creates a vapor barrier at the clamping points on insulated tube/pipe runs. It allows for sections of insulation to be secured without having to remove the clamp assembly while also maintaining the integrity of the insulation. This patented design provides a superior fit and finish of insulated piping systems. Klo-Shure is UL 25/50 flame- and smoke-rated and made in the USA.