-Premium HDPE material is non-fading and crack-resistant-Providing 200 lbs large water filling capacity-Fill and empty the umbrella base easily with spouts-Each plates can be stacked up to save space-Easy to transport and store with hidden handle and stackable design-Multiple holes keep bottom dry-Suitable for various occasions like patio garden-Assembly is easy without toolsâ- High Strength and Durable Material - Constructed of all weather resistant HDPE the 4 pieces umbrella base set is not easy to crack or fade in any weather conditions. Likewise the rugged material is deformation resistant for long-term use.â- 4 Pieces Large Square Plates - The offset umbrella base consists of four 20" x 20" x 5" plates which can be simply put together to fix your cross bar base(not included). The flexible design requires no tools for assembly which is a great convenience.â- Fillable Base Adds Stability - Each plate can be filled with 5.3 gal water or 240 lbs sand to add weight of the base. Ther