CANOPY VENT: The top vent of the cantilever parasol allows air to pass through the bottom to outside, helping to prevent it lifting up the canopy and overpowering it.STEEL POLE: The main structure of the garden umbrella parasol is solid and tough, stands steadily upright all day long. Eight ribs attached to the canopy for extra support.OFFSET CANTILEVER UMBRELLA: This dark blue square offset cantilever umbrella can cover large patio furniture that doesn't have a hole to mount a standard umbrella to. Use it to cover outdoor sectionals, pool lounge chairs, or patio dining sets to provide comfortable shade even in difficult situations.CROSS BASE INCLUDED. WEIGHTS REQUIRED BUT NOT INCLUDED.DIMENSIONS: Φ295 x 255Hcm. Pole: 4.8cm diameter. ASSEMBLY REQUIRED.