1" ID x 1-1/2" OD

This nylon nozzle holder is for hoses with a 1” inner diameter (ID, which goes inside the nozzle) and a 1 1/2” outer diameter (OD, which goes over the outside diameter of the blast hose). 

1" ID x 1-1/2" OD

This nylon nozzle holder is for hoses with a 1” inner diameter (ID, which goes inside the nozzle) and a 1 1/2” outer diameter (OD, which goes over the outside diameter of the blast hose).