Beach umbrella,outdoor parasol,outdoor umbrella Waterproof and UV treament 2.7m/3m hanging umbrella,pole:Dia38mm/48mm,6/8ribs Detailed Product Description:Sunshade umbrella:Structure ... ) Diameter of round shaft: φ38, φ48, φ55; Rib: 6 ribs, 8 ribs, 10 ribs;4. Base: round base or square base; Granit base, marble ...