For modern kitchen taps, that have a built in aerator cartridge. This tap connector provides a secure method of temporarily attaching a Hozelock connector to a kitchen tap.|Simply remove the existing aerator cartridge from the end of the tap, and then screw in the new Hozelock cartridge. The new cartridge protrudes by an extra 8mm - there is a 3/4" bsp thread on the protrusion.|Also included in the pack is a tap connector. Screw this onto the 3/4" bsp thread when you want to connect the hose to the tap. For the rest of the time the plastic tap connector can live in a kitchen drawer!