... and reasonable price. 3.At the bottom of the tube aluminum plate. Cast aluminum umbrella base Plinth base plate1) Environmentally-friendly.2)Surface ... Coating, Polishing, Brushing, Sand Blasting,3)Material: Aluminum alloy,ADC12,ADC6,Alsi12,Alsi9cu3. 4)Aluminum casting:88T,180T,280T,420T,600T,800T ... their parts. 6)Delivery by sea or air on time. Cast aluminum umbrella base Plinth base plate