• Spring Activated Steel Ledge (Supports Open Umbrella) • Fiberglass Ribs Fit Securely Into Reinforced Pockets • 1 1/2" Diameter Aluminum Lower Attachment Pole • 1 3/8" Diameter Aluminum Upper Pole • Crank Umbrella is Raised With A Steel Cable • Heavy Gauge Tilt Mechanism (Optional) • Heavy Gauge Resin Runner & Notch • Powdercoated White Metal Bell Cap • Molded Heavy Gauge Resin Joints • White Powdercoated Centerpole • Stainless Steel Rivets & Parts • Solid 8 mm Fiberglass Ribs