... anti-ultraviolet ray, insect-resistant, corrosion-proof, waterproof, never-fading and durable.2 The aluminum frame we use in our products is made ... or aluminum. We have baking varnish on the surface which can protect it from corrosion.3 With zipper closure, our waterproof cap ... glass.6 We provide 5cm, 8cm and 10 cm pillows and cushions, 5cm and 9cm glass for you to choose from. dia 2.5m umbrella