ECMA B11.04.00.00 Four-double-wall tray, locking corners, webbed corners

Length (A) Width (B) Height (H) Thickness

Nicks

12×24 mat — 8.96″ × 11.83″

Unglued selflocking tray with 4 double walls with locking corners; locking flaps system with fold over ends with webbed corners. B10.04's web at every corner, locked. The end wall's return tab runs a third of the height proud at each end, and each side wall's fold-back carries a tongue half a wall wide that stands past the base into the corner, where those two ears trap it. The fold-back is set back a third of the height everywhere else, so nothing but the tongue reaches a corner. ECMA catalogue, p.37 ↗