With this metal extension of 9 cm, the hauck safety gates for doors and stairs clear step, autoclose n stop 2, autoclose n stop, open n stop kd, open n stop and stop n safe 2 can be extended in the twinkling of an eye.all hauck safety gates have a standard dimension of 75 - 80 cm and can be combined with a maximum of two extensions - one on each side. In addition to the extensions, you can use the hauck y-spindles to install the safety barriers on round stair railings. The y spindles replace the adjustable pressure screws of the safety gate.the following measurements are possible:75 - 80 = safety gate - standard dimension84 - 89 cm = safety gate + 9 cm extension 93 - 98 cm = safety gate + 2 x 9 cm extension105 - 110 cm = safety gate + 9 cm extension + 21 cm extensionproduct dimensions: 77cmx9cmx2cmcomposition: plastic, steelthis product will be dispatched by one of our trusted suppliers. You’ll be contacted by their selected courier about your delivery.