Plastic Multi-Barb fittings are primarily produced with materials that are NSF-51 and NSF-61, FDA, and USP Class VI approved, and RoHS compliant. Standard materials are Natural nylon, -40° to 200° F. Black Polypropylene and Black Polyethylene are UV resistant and can used with numerous chemicals. Temperature ranges of these materials are -65° to 190° F. Some products available by special order are Bovine free natural polypropylene or PVDF. Maximum working pressure 125 PSI. Hose clamps are recommended, low pressures, such as drain lines, etc. may not require clamps.