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Compliant and trusted Tristar Grade A Surface BoxesTristar BS 5834-2 Grade A surface boxes are suitable for use in carriageways carrying fast-moving commercial vehicles having wheel loads up to 5 tonnes. They are designed for quick, easy and reliable access and are available with hinged, double-tri and single piece covers. ![]() Double triangular coversTristar double triangular surface box rated to Grade A and are suitable for use in carriageways carrying fast-moving commercial vehicles having wheel loads up to 5 tonnes. They are designed to be strong and durable.
Single Piece Covers
Single piece covers, circular opening
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