Comparison : Item # 301-8-8, 1/2 Inch (in) Flange Size CD61 Flange Head X Flange Head
Item # 301-12-12, 3/4 Inch (in) Flange Size CD61 Flange Head X Flange Head
Item # 301-16-16, 1 Inch (in) Flange Size CD61 Flange Head X Flange Head
Item # 301-20-20, 1-1/4 Inch (in) Flange Size CD61 Flange Head X Flange Head
Item # 301-24-24, 1-1/2 Inch (in) Flange Size CD61 Flange Head X Flange Head