41 x 51mm, large contact area, provides a more stable umbrella stand with improved wind resistance. Foldable design allows for compact storage and does not protrude after installation. Interior lined with nylon plastic; not compatible with sunshades. Fits parasols with pole diameters between 20 and 26.5 mm. Surface treated with deep anti-oxidation process and anodized coating to enhance 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 parasol or umbrella Package Contents: 2 x Umbrella Stands