Polyester finished coloured aluminium frame, available in 5 colours. Rounded corners, 10 % fibreglass. Sides: RAL 9002 grey steel Very strong plexiglass set on silicone, waterproof. Safety: turnable hinges integrated in the frames for better security. 2 point safety lock. 4.4 cm thick (useful 2.4 cm). H 71 x W 53 cm, suited for 4 pages.