... Malleable iron,Ductile iron Rod Size:1/4-3/8-1/2.. Surface:Plain,Zincing UL Certificate ... .2. week capacily of 10000 pcs.3.large for cheap pric steel beam clamp1) Our span ... clamp is weight,and convenient installation.2) It's used for "I" steel crystallization.3 ... ) Size: M10,M12. Inch standard , 3/8", 1/2", 5/8", 3/4"......4) Material: ...