Expansive coverage: 15ft rectangle patio umbrella provides 123 sq ft of shade, perfect for pool decks, backyard dining, and outdoor restaurants. The large rectangular design fits 4–6 person outdoor dining sets or patio furniture sets. Premium construction: Heavy-duty patio umbrella features 12 rust-proof metal ribs and 180g UPF50+ waterproof polyester fabric that blocks 99% of UV rays – 30% heavier than standard market umbrellas for maximum durability. Dual stability system: Windproof patio umbrella includes a cross base and fillable sandbag weights (80–120 lbs) for wind resistance, with a vented canopy to reduce wind lift by 40%, and a 1.9-inch diameter powder-coated metal pole. Convenient operation: One-hand crank umbrella opens and closes in 10 seconds with no assembly required. The safety latch prevents accidental collapse, while the reinforced crank mechanism ensures smooth operation. No tilt function – optimized for straight-up wind resistance. Commercial-grade versatility: This heavy-duty 15ft patio umbrella features a 1.89-inch powder-coated metal pole (dimensions: 174"L x 102"W x 100"H). Designed for use in hotels, cafes, and luxury residences. For maximum lifespan, please close during high winds or rain.