... 7 x 4, 60 x 7 x 4, 65 x 7 x 4, 70 x 7 x 4, 75 x 7 x 4, etc. 2 ... , America standard is available <1'' x 3/16'', 1 1/4'' x 3/16'', 1-1/2'' x 3/16'', 1 ... '' x 1/4'', 1-1/4'' x 1/4'', 1 1/2'' x 1/4''(19-w-4),(19-w-2) and so on.> 3 ... requirement and 50, 100mm are recommended, America standard is available. 4) Material:Mild Steel (Low Carbon Steel) or Stainless Steel 5 ...