4" Storz Coupling Set Hose Size (ID)_1" Hoses 3 inch NH / NST

3 inch NH / NST fittings measure approximately 3 5/8"

5 inch NH / NST male hose coupling or fire hydrant is 1

male coupling on top

Brass Male to Male Adapter

4" Storz Coupling Set Hose Size (ID)_1" Hoses 3 inch NH / NSTThese 4 inch storz replacement couplings come complete with hose shank, removable collars and set screws. Collar screws take a 5 16 inch allen wrench. These will fit most rubber covered LDH firefighting grade supply hose and are the OEM couplings for Key Fire Hose Pro Flow LDH. Storz couplings comes as a set with one coupling for each hose end. Couplings will NOT fit discharge hoses such as the common blue and red discharge hose which are thinner