Galvanised steel. Double sliding doors. Door opening size (H)165, (W)110 cm / (H)5ft 5in, (W)3ft 7in. External size (H)190, (W)253, (D)212cm / (H)6ft 3in, (W)8ft 5in, (D)7ft 0in. Internal size (H)187, (W)241, (D)199cm / (H)6ft 2in, (W)7ft 11in, (D)6ft 6in. Overhang size (W)5, (D)5cm. 2 person assembly. Packed flat for home assembly. Manufacturer's 10 years no rust perforation guarantee.