This professional cantilever umbrella base is optimized for outdoor use and perfectly fits all cantilever umbrellas. It innovatively combines ease of movement with stable support. Equipped with a universal wheel system and a retractable push-pull rod, it allows for precise positioning and flexible movement of the umbrella, while ensuring reliable retention even in strong winds. Note: • Please measure the umbrella pole diameter or table size before use. ▸ Set Contents: 1 square mobile umbrella base ▸ Material: ▸ Functional Design: ▸ Performance Advantages: ▸ Base Dimensions: 33.46"L × 33.46"W × 7.6"H ▸ Rod Length: 38.98" (adjustable) ▸ Installation Parameters: 6.3" diagonal screw hole spacing ▸ Counterweight Method: Water/sand mixture filling