Trio290 Truss Straights. 7 Lengths AvailableTR30105 Triangle Size: 290 x 290 x 290mm Tube Size: 50mm Length: 0.5m Weight: 6kg TR30110 Triangle Size: 290 x 290 x 290mm Tube Size: 50mm Length: 1m Weight:8kg TR30120 Triangle Size: 290 x 290 x 290mm Tube Size: 50mm Length: 2m Weight: 11kg TR30130 Triangle Size: 290 x 290 x 290mm Tube Size: 50mm Length: 3m Weight:16 kg. Straight aluminium trussing pieces from the TRIO 290 trussing range. There are various length available and they can be joined together to any desired size.. Aluminium trussing-trio trussing-straight trussing