The Dog Park Umbrella: Boxer Dog Silhouette SHAFT: Brawny wide gauge (14mm) steel shaft for extra strength and rigidity, coated black for rust resistance. This is the backbone of the umbrella which along with the matching black steel cap (thats the pointy end) gives it the robustness to be used as a walking stick. CAP: Wide gauge black steel as mentioned above for firmness and anti-chafe properties when used as a walking stick HANDLE: Rubberized crook handle for comfortable grip MECHANISM: Automatic opening mechanism with wide gauge to match the shaft and heavy duty spring for added durability RIBS: Fiberglass ribs for an extraordinary degree of wind resistance not found on the typical umbrella made with metal ribs that tend to kink and break even from light use TIPS: Black plastic tips on the end of the ribs giving an attractive accent while dulling the effect of inadvertently poking other people or yourself with the open umbrella CANOPY: 100% 190 thread count Pongee, the finest quality polyester material available, with Teflon coating for waterproofing as well as a UV coating, opens to full 48 arc. STRAP: Velcro for easy opening and closing Diameter of canopy: 36 inches