SPECS: Recommended for: 11 ft. canopy size of market patio umbrellas Holds: Up to 1.89 in. diameter Weight capacity: 50 lbs. Wheels: 1-1/2 in. diameter DESIGN & DETAILS: Tension knob secures firmly in place using hyper-strong holding abilities, providing increased grip on umbrella pole Poly resin material resists weather, rust, cracking, and impact to outlast the harshest effects of outdoors and maintain high quality after heavy use 4 wheels enable easy rolling when moving around furniture in case outdoor area needs rearranging Stem offers durable powder-coated surface that will never need repainting, maintaining smooth and untarnished appearance long into use Made with rustic appeal and basket weave textured pattern