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Type 4 wall tie for use in the external walls of houses and small commercial developments up to 10 metres in height. It is also a Type A tie for internal separating walls of buildings of any height. Suitable for 101-125 mm cavity width Includes multi drip feature to prevent moisture travelling across the cavity The Staifix HRT4 has BBA approval and meets the technical requirements of the NHBC CE Marked 1 box contains 250 ties