Comparison : Item # 1500C, 1 1/2 Inch (in) Thread Size Plastic Hydrant Cap Fitting
Item # 2000C, 2 Inch (in) Thread Size Plastic Hydrant Cap Fitting
Item # 2500C, 2 1/2 Inch (in) Thread Size Plastic Hydrant Cap Fitting
Item # 3000C, 3 Inch (in) Thread Size Plastic Hydrant Cap Fitting