3/4" ID x 1-5/16" OD

This nozzle holder is for hoses with a 3/4” inner diameter (ID, which goes inside the nozzle) and a 1 5/16” outer diameter (OD, which goes over the outside diameter of the blast hose). 

3/4" ID x 1-5/16" OD

This nozzle holder is for hoses with a 3/4” inner diameter (ID, which goes inside the nozzle) and a 1 5/16” outer diameter (OD, which goes over the outside diameter of the blast hose).