Comparison : Item # 1031-1951-08-H, 1/2" Tube O.D. Steel Half Flange Code 61
Item # 1031-1951-12-H, 3/4" Tube O.D. Steel Half Flange Code 61
Item # 1031-1951-16-H, 1" Tube O.D. Steel Half Flange Code 61
Item # 1031-1951-20-H, 1-1/4" Tube O.D. Steel Half Flange Code 61
Item # 1031-1951-24-H, 1-1/2" Tube O.D. Steel Half Flange Code 61