Nozzle Holder Size To Fit Outside Diameter Pipe

1/2" Nozzle Holder will fit 19 - 21mm (Approx) Outside diameter of pipe
3/4" Nozzle Holder will fit 25 - 27mm (Approx) Outside diameter of pipe
1" Nozzle Holder will fit 31 - 33mm (Approx) Outside diameter of pipe
20mm Nozzle Holder will fit 20mm Outside Diameter Pipe
25mm Nozzle Holder will fit 25mm Outside Diameter Pipe