DX51D hot dipped galvanized steel strip 1.Grade:SPHC,SPHD,SPHE,SGCC,DX51D+Z 2. ... -2.0mm 3.Zinc:60-275g/m2 ProductDX51D hot dipped galvanized steel strip StandardEU, GB, JIS, etc GradeSPHC SPHD SPHE, SGCC, DX51D ... 4 circumferential bands in steel, galvanized metal fluted rings on inner and outer edges, galvanized metal and waterproof paper wall protection disk, galvanized metal and waterproof paper ...