Application Outdoor or Indoor for use with all types of Galvanized steel conduit pipe fittings. Options Thread : ISO Metric ET NPT NPS BSP BSPT PG Plating : Electroplated Nickel (NP) Chrome (CP) Zinc (ZP) Tin (TP) Standard : BS 4568, Part-2, 1970., BS 31, 1940 & also light Duty can be Supplied Material Brass CZ121 316 Stainless Steel Sizes in Metric From M12 to M90