Comparison : Item # 20SF-20SAE90, 1-1/4 Inch (in) Flange Size SAE Thread to Flange Head - 90 Degree
Item # 24SF-24SAE90, 1-1/2 Inch (in) Flange Size SAE Thread to Flange Head - 90 Degree
Item # 32SF-32SAE90, 2 Inch (in) Flange Size SAE Thread to Flange Head - 90 Degree
Item # 40SF-40SAE90, 2-1/2 Inch (in) Flange Size SAE Thread to Flange Head - 90 Degree
Item # 48SF-48SAE90, 3 Inch (in) Flange Size SAE Thread to Flange Head - 90 Degree