2-tier vents allow for full airflow and heat dissipation. Hot air or wind will flow through the multiple vents quickly which can make your market umbrella more stable against windy conditions and cooler underneath.
Outsunny 13 kg Concrete Round Patio Umbrella Base Stand, Heavy Duty HDPE Umbrella Holder with Steel Pole, Parasol Stand for Patio, Outdoor, Garden, Black
DASBET Outdoor Umbrella Base Outdoor Umbrella Stand Patio Umbrella Stand Beach Umbrella Stand Portable Umbrella Stand Patio Umbrella Base Holder with Weight Bag Iron Umbrella Stand for Courtyard, Gard
PURPLE LEAF Patio Umbrella Base Water & Sand Filled Weighted Base Outdoor Umbrella Base for Cantilever Offset Patio Umbrella, 90KG
UMBFUN Patio Umbrella Base for Outdoor Umbrella Base for Cantilever Offset Patio Umbrella - Water & Sand Filled Weighted Base,120KG(90x90x21CM)
Wanhork Heavy Duty 304 Stainless Steel Patio Umbrella Holder,for Outdoor Fixed Deck Railing (Fit Max OD 1.9 Inch) Sun Umbrella Base and Bracket(Post, Black)
Simple Deluxe 20" Round Heavy Duty Patio Umbrella Base Stand with Steel Umbrella Holder, Water or Sand Fillable for Outdoor, Lawn, Garden, 50lbs Weight Capacity, Black