Specifications: Color: Black Material: HDPE Dimensions: 40 in. x 40 in. x 2.5 in. Each Plate Size: 20 in. x 20 in. x 2.5 in. Stackable Size: 20 in. x 20 in. x 10 in. Water Capacity: Up to 135 lbs. Sand Capacity: Up to 185 lbs. Sand & Water Capacity: Up to 220 lbs. Net Weight: 16 lbs. Compatible Umbrella Size: 9–10 ft Design: 4-piece locking plate system Recommended Use: Patio, deck, garden, poolside, outdoor seating Description: Secure your offset patio umbrella with this 4-piece fillable umbrella base set, designed for outdoor areas such as patios, decks, poolside lounges, gardens, terraces, and backyard seating spaces. Crafted from HDPE material, each plate is designed for outdoor use and helps resist sun exposure and water contact for long-term performance. The set includes four square plates that work together to support cantilever umbrella cross bases (not included), with built-in locking metal hooks that help connect the plates for improved stability. Each plate features a refillable reservoir that can be filled with water, sand, or a combination for added weight. Total capacity reaches up to 135 lbs. with water, 185 lbs. with sand, and 220 lbs. with a sand-and-water mixture, helping maintain balance in outdoor conditions. The plates include grooved handles for easier carrying and are stackable for convenient storage when not in use. Designed for 9–10 ft offset umbrellas, this base set is suitable for residential patios as well as outdoor café and event seating setups. Note: Actual product color may slightly vary from the images shown due to lighting conditions during photography and individual monitor or device display settings.