This is a box corner for the Total Fabrications (Total Solutions Group) OV30 30 cm square aluminium truss system, supplied without couplers. A corner block lets riggers and staging crews join OV30 truss sections at right angles to build rectangular ground-support frames, lighting grids, goalposts, exhibition booths and roof or tower structures. OV30 is a 300 mm square truss designed to the latest Eurocodes and manufactured to EN 1090-1, using 48.3 x 2.6 mm main chords and EN AW-6082 T6 aluminium alloy, with loading charts calculated to EN 17115. The OV range uses conical (taper) connectors fixed with TFC pins and R3 clips for fast, rigid assembly; because this item is sold with no couplers, the required conical connectors, pins and clips must be ordered separately to suit the number of truss faces you are connecting. Total Fabrications is a UK manufacturer widely used by rental and event companies. Always have truss structures designed and inspected by a competent person and respect the published load tables.