. Owners have a complete range of tilt positions at their fingertips and a resilient, easy to use umbrella frame that will bring years of shade enjoyment.5’ California Market Umbrella. The tough aluminum pole is matched by the innovative use of a 1/2-inch diameter premium fiberglass rib system which adds flexibility and longevity under light windy conditions; by the extra-large canopy using thicker and more resilient fiberglass.