Features: Dimensions & Capacity: Measures 33.5" L x 32.7" W x 5.4" H. Recommended to add 55 lbs of sand and 50 lbs of water for enhanced stability. Compatibility: Specifically designed for single-top olefin umbrellas. Not suitable for double-top umbrellas and does not include a cross base. Material Quality: Made of high-quality plastic, fade-resistant, waterproof, and UV-protected for long-lasting outdoor use. Ideal Umbrella Size: Best paired with umbrellas sized 8 'x 8' and 9 'x 9' for optimal performance. Customer Support: Contact us anytime for assistance with installation or any issues with the product. Ideal Umbrella Size: 8' x 8' : Please search 43425405 9' x 9' : Please search 43425402