Product Description Threaded Polypropylene Cap 9 sizes available: 2 with NPT Threads Self Seal System: Available with the unique self seal system (pre-assembled o-rings) that saves labour and Teflon, and allows tightening without tools Materials: O-Ring EPDM Fertilizer resistant Technical specifications Materials: PP Threads: BSPT Max. working pressure: 16kg/cm2 Fertilizer resistant Click for Product Dimensions