square umbrella: 1.structure:Yaris cloth+alum-bracket 2.Cloth: water-repellent,UV resistant,330g/m3 3.100% shade space unilateral umbrella: Detailed Product ... shaft: φ38, φ48, φ55; Rib: 6 ribs, 8 ribs, 10 ribs;4. Base: round base or square base; Granit base, marble base, cement base ...