John Guest 5/16" QC X 3/8" Quick Connect Union Reducing Connector

3/8"  X 5/16" John Guest Quick Connect Fitting   The body is produced in polypropylene  O Rings are EPDM The collet is produced in polypropylene with stainless steel teeth Quick Connect Fittings connect and disconnect without tools and never leak. Reliable and easy to use. NSF and ISO 9001 Certified and are trusted by the world's largest manufacturers. Create a water tight seal every time. We carry a large inventory of 1/4", 3/8" & 1/2" fittings, valves & tubing. Polypro fittings and their EPDM o-rings are more resistant to chemical degradation than the Grey Acetal Fittings which have been available for many years. Works great for drinking water and most other applications