Comparison : Item # A20-10-500-840, 1/2 Inch Sch. 10 Alloy 20 Seamless or Welded Pipe
Item # A20-10-750-1050, 3/4 Inch Sch. 10 Alloy 20 Seamless or Welded Pipe
Item # A20-10-000-1315, 1 Inch Sch. 10 Alloy 20 Seamless or Welded Pipe
Item # A20-10-1250-1660, 1 1/4 Inch Sch. 10 Alloy 20 Seamless or Welded Pipe
Item # A20-10-1500-1900, 1 1/2 Inch Sch. 10 Alloy 20 Seamless or Welded Pipe