41 x 51mm base, large contact area provides increased stability and improved wind resistance. Designed to protect your tackle box. Foldable design allows for compact storage and easy installation without hanging. Interior lined with nylon plastic to protect umbrella pole; not compatible with sunshades. Fits parasols with pole diameters between 20mm and 26.5mm. Surface treated with deep anti-oxidation process and anodized coating for enhanced resistance to corrosion and wear. Product dimensions: base 5.1 x 4.1 cm, height 6 cm. Foldable design enables storage without disassembling parts. Product Name: Foldable Umbrella Stand. Material: Aluminum Magnesium Alloy. Umbrella stem size: 20-26.5mm. Process: CNC integrated molding. Surface treatment: deep antioxidant treatment. Function: secures parasols and umbrellas. Package includes: Set of 2 umbrella stands.