... 48mm main pole, all aluminium, powder coated 2) Size:4m*4m 3) Different colors are optional Square Patio Umbrella with ValanceDescription ... Ribs: 8, 17*28mm, aluminium Pole Diameter: 48 mm Fabric: polyester, acrylic ,235g Canopy Shape: Square, 4m*4m, 3m*3m Canopy ... Color: Forest green Tilt: None Pole Material: Aluminium, powder coated Base: ...