Staifix HRT4 Type 4/TYPE A Housing Tie 275mm Box 250The Staifix HRT4 Type 4 Wall Tie is designed for use in the external walls of houses and small commercial developments up to 10 meters in height. It is also suitable for internal separating walls in buildings of any height. This wall tie includes a multi drip feature to prevent moisture from crossing the cavity and is CE Marked for compliance with European standards. With BBA approval, it meets the technical requirements set by the NHBC. Key Features