... Powder,Darcromet 4)Size: 2x1"--8x4" 5)Color: RAL3000UL/FM Mechanical Tee Grooved Features:1)Finish:Paint,Epoxy Powder,Darcromet2)Size ... system on subway station ,railway station ,airport, seaport,bridge,etc Mechanical Tee (Threaded)--Grooved fittings