STURDY 4-PLATE DESIGN: Made with interconnecting pins to lock your umbrella base in place and secure it for hours of enjoyment (Note: Crossbar base not included) EASY-TO-FILL SPOUTS: Each plate is built with a fill spout and a twist cap to create a water-tight seal for quick and easy refills, ballast disposal, and relocation HIGH WEIGHT CAPACITY: The plates can hold up to 13.2 liters of water (per plate) or 38.9 pounds of sand (per plate), so your patio umbrella will have a reliable anchor point HEAVY-DUTY & WEATHER-RESISTANT: Made of HDPE plastic to withstand impact and constant movement, and treated with a weather-resistant coating OFFSET UMBRELLA ESSENTIAL: Provides a solid anchor for compatible umbrellas and protects them from incidental damage caused by falls and harsh weather (Search: SKY5681 or SKY5248); OVERALL DIMENSIONS (per plate): 19.7"(L) x 19.7"(W) x 3"(H); Capacity (per plate): 13.2L of water, or 38.9 lbs. of sand &lessthan;b&greaterthan;Specifications:&lessthan;/b&greaterthan; &lessthan;br&greaterthan;Overall Dimensions (One plate): 19.7"(L) x 19.7"(W) x 3"(H) &lessthan;br&greaterthan;Overall Dimensions (Four plates): 39.7"(L) x 39.7"(W) x 3"(H) &lessthan;br&greaterthan;Capacity (per plate): 13.2L of water, or 38.9 lbs. of sand &lessthan;br&greaterthan;Weight: 19 lbs.(Unfilled) &lessthan;br&greaterthan;Weight(Filled): 52.8L(Water) &lessthan;br&greaterthan;Weight(Filled): 155.6lbs.(Sand) &lessthan;br&greaterthan;Material: Plastic &lessthan;br&greaterthan;No assembly required &lessthan;br&greaterthan;NOTE: Crossbar not included. &lessthan;br&greaterthan; &lessthan;b&greaterthan;Package Includes:&lessthan;/b&greaterthan; &lessthan;br&greaterthan;(4) Base plates &lessthan;br&greaterthan; &lessthan;br&greaterthan;For Residential Use Only&lessthan;p&greaterthan;BCP SKU: SKY6265&lessthan;/p&greaterthan;