-1) standard: ul 797 ANSI C80.3 -2) ALL SIZE AVAILABLE: 1/2''-4" Our EMT is manufactured from high-quality CRC, ... welding process, the finished tube is uniform in OD size, wall thickness and ductility, the exterior and interior surfaces ... 797 ANSI C80.3 BS45682) size: 1/2'', 3/4'', 1'', 1-1/4'', 1-1/2'', 2'', 2-1/2", 3", 4".3) all ... widely used under poor condition. EMT tube-1/2"-4" all size available