Formosa Covers 9ft Umbrella Replacement Canopy 6 Ribs in Dark Navy Olefin (Canopy Only) Make sure umbrella is 6 panels canopy with ribs length 52" to 54" 9ft umbrella replacement canopy for 6 ribs umbrella in Navy Blue Fits 6 ribs umbrella frame EACH rib must measure 52" - 54" Olefin fabric with UV treated, Very good colorfastness 1200 sun hours Replacement Umbrella CANOPY ONLY. Air vent canopy.