Fits for 9ft 8-rib Offset Aluminum Umbrella; Shape of umbrella ribs: Elliptic; Dimension of each rib tip (WxH): 1/2' x 11/16' (12 x 18 mm) Powered by the sun, energy-efficient, low power consumption and energy saving Latest improved solar panel, high conversion rate and long usage time Red button for turning on/off the LED lights; Creates romantic ambiance and ample warm lighting for outdoor patio & table umbrellas Easy to install, 42 all-weather plastic clips for fixing strands onto umbrella's ribs