The Double-Vented Aluminum Center-Pole Round Patio Umbrella with Weighted Base (model CPU-ALU-2700-DV-BG, unbranded) is a freestanding outdoor center-pole patio umbrella designed for reliable open-air shading across residential and commercial settings. Its visual profile features a smooth round beige canopy paired with a sleek matte powder-coated metal frame, accented by a polished marble composite base that sits flush against flat outdoor surfaces. The two-tier vented crown adds subtle dimensional detail to the canopy’s clean, symmetrical silhouette, while the fixed upright pole creates a balanced, unobtrusive layout that centers evenly over round seating arrangements without protruding hardware or offset supports. Construction prioritizes durable, weather-ready materials: the 40 mm thick center pole and 8 radial support ribs are built from powder-coated anodized aluminum alloy with 1mm wall thickness, sized to match load-bearing requirements. The 280 gsm solution-dyed polyester canopy carries a PU waterproof coating, with reinforced polyester webbing binding stitched at 8mm seam pitches and double-stitched vent panel seams for long-term wear. Internal connectors use UV-stabilized ABS engineering plastic, with M6-M10 fasteners securing at least 2 fixing points at every major joint, while the lift system relies on corrosion-resistant stainless steel pulleys and braided cord. The polished solid weighted marble composite base includes a non-slip pad, with a recessed slot to hold the pole without permanent bolting, and all moving parts maintain 5 mm operating clearance for smooth function. Total assembled weight with the base reaches 35 kg, with the frame alone weighing 12 kg; the fabric delivers 100 N tear strength, grade 4 color fastness, and UPF 50+ UV protection, while main ribs support 50 kg static load at the midpoint for stable performance. Practical functions include a pulley pull-cord lift that locks securely at full open position, and a double-tier top vent that allows air passage to reduce wind lift. The frame uses a knockdown design with detachable pole segments for compact storage and transport, and the canopy is compatible with standard 48mm diameter center pole replacement canopies. The umbrella does not include an integrated tilt mechanism, holding a fixed upright shade position, and supports custom logo printing on the canopy valance for commercial branding needs. This umbrella suits a wide range of outdoor spaces: it pairs seamlessly with backyard round dining sets and lounge seating for residential patios, fits cafe, restaurant, and hotel outdoor dining zones, works for lawn events, garden parties, and market stalls, holds up to pool deck placement thanks to its corrosion-resistant frame, and complements high-end resort and villa outdoor leisure areas. Procurement teams should note that each unit ships as one set across 2 cartons, with a packaged gross weight of 120 kg and total packaging volume of 0.8 m³ per set. Assembly takes 40 minutes per unit, with no permanent mounting required for installation, and replacement canopies are widely compatible with standard pole sizing for long-term maintenance flexibility.