Twin Slot Night Vent Keep Plate For Use With Window Dead Lock

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Trickle vents, or slot vents, are small openings incorporated into windows or external walls of buildings The vent size you use depends on

A 550mm long, 22mm wide Greenwood trickle vent Includes internal and external canopies which neatly cover routed slots to comply with building regulations  Slot size: 390mm x 16mm EA

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