... steel U-channel Grade: AISI 304, 201 ,316 , 321 etc, Size: 6 #-24 # Surface: bright, polished, peeled Why Sen Po is your ... (00Cr17Ni14Mo2) 321 (0Cr18Ni11Ti) 431(1Cr17Ni2)lStandard :ASTM A276/A484lSize:5#,6#,8#,10#,12#,14#,16#,18#,20#,22#,24#lLength ...