Magma Products Cockpit Umbrella Fade Resistant Acrylic Nylon Canopy with Venting Mesh Windproof Design Quick release all angle fully adjustable rail mount Corner tie down securing straps. The umbrella includes a 7/8 or 1 (22mm or 25.5mm) round rail mount which has been manufactured of 18-8 Stainless Steel and 365 Anodized Aluminum. This mount adjusts to fit any angle on vertical stanchions or horizontal railings.