• Fillable design can ensure high stability and wind-resistance • High quality HDPE is durable and weather-resistant • Applies to offset umbrella with 1.9" diameter umbrella pole(not included) • Cross base is provided to match with your offset umbrella • 2 flexible wheels and convenient handles facilitate effortlessly movement • Easy to fill the base with large hole • Equipped with drain hole for quick drainage • Applicable to poolside, patio, beach • Tool-free assembly is simple for you