Item No. Size Product Size (inch) Product Size (mm) Package Size (inch) Package Size (mm) Net Weight (lb) Net Weight (g) Gross Weight (lb) Gross Weight (g) ZHUMI-OP-SDZ22SZ-16D5CP 16 16.73 × 16.73 × 12.60 424.94 × 424.94 × 320.04 24.14 × 20.14 × 3.80 613.16 × 511.56 × 96.52 21.61 9802.15 23.58 10696.71 ZHUMI-OP-SDZ22SZ-18CP 18 18.11 × 18.11 × 12.99 459.99 × 459.99 × 329.95 24.21 × 20.14 × 4.06 614.93 × 511.56 × 103.12 30.20 13698.49 32.40 14696.39 【Durable and Windproof for Long-term Outdoor Use】 It is made with a high-density resin base and an iron frame, featuring waterproof, UV-resistant, and anti-aging properties. It effectively prevents rusting and peeling of paint. The material is tough and can be used outdoors for a long time without worrying about wind or sun exposure. 【Stable and Secure - Resistant to Wind and Does Not Shake】 The overall structure is reinforced, and it is equipped with a manual tightening knob. The 30-pound cast stone material provides strong support, ensuring that the umbrella body can be firmly fixed even in windy conditions, preventing it from tipping over. This makes the use safer. 【Tool-free quick assembly with versatile appearance matching capabilities】 No additional tools are required. The assembly can be completed easily in just a few minutes. It comes with a hard copper-colored coating, presenting an outstanding appearance. It can embellish various outdoor spaces and is suitable for gardens, balconies, terraces, swimming pools, barbecue areas, restaurants, and can be used both in residential and commercial settings.