?Package Includes?: 1/2" Pex B Fittings Set includes 6pcs PEX 1/2" x 1/2" NPT Female Threaded Adapter ?Non-Pollution?: Lead free brass pex female adapter 1/2", comply with drinking water standard. ASTM F1807 NSF/ANSI 61 Certified. ?Extra-Long Service Life?: High-quality brass pex fittings, resists corrosion, rust and high temperature (32?200?). ?Applications?: This brass crimp 1/2 inch Pex fittings Set can be used only for PEX B pipes in plumbing jobs. Great for hot or cold water distribution and and hydronic heating systems in your home, in warehouse or in RV. But NOT UPONOR/Wirsbo EXPANSION SYSTEM PB TUBE. ?Compatible Products?: Pex Fittings 1/2 inch Set use with Stainless Steel Clamp Rings or PEX Crimp Copper Rings. (Clamp rings are not included in this set.) ?Warm Tips?: NOT Compatible with UPONOR/Wirsbo EXPANSION SYSTEM PB TUBE. ONLY for PEX B pipes.