【Material】Constructed from industrial grade stainless steel with a black paint finish, this Umbrella Tube Bracket is designed to resist rust, ensuring long term durability 【Included Accessories】The Umbrella Stand Tube includes three Patio Table Umbrella Hole Ring Plug in sizes 1-1/4 inches (32mm), 1-1/2 inches (38mm), and 1-9/10 inches (48mm). Choose the appropriate sleeve based on your umbrella pole diameter, secure it with the two tightening knobs on the stone umbrella stand to keep your umbrella steady even on windy days 【Easy Installation】A screw hole (12mm) at the bottom of the Umbrella Tube Bracket allows you to easily secure it by passing a screw through both the granite base and the stainless steel stand, then tightening it for a firm hold. Additional stability is provided by two fixing knobs on the stand 【Application】This versatile Umbrella Pole Mount Stand Tube can be mounted on cement slabs, granite plates, iron sheets, wooden tables, slate stones, marble slabs and more. It’s compatible with umbrellas, flagpoles, weather vanes and other poles—ideal for creating a unique DIY base using heavy materials like discarded granite or cement slabs 【Size】Length 30cm/11.81inch, Bottom Diameter 8cm/3.15inch, Up Diameter 6cm/2.36inch Specification: Length 30cm/11.81inch Bottom Diameter 8cm/3.15inch Up Diameter 6cm/2.36inch Package Size: 32cmx9.5cmx9.5cm/12.60inchx3.74inchx3.74inch Package Includes: 1 Umbrella Stand Tube 3 Patio Table Umbrella Hole Ring Plug(32mm, 38mm, 48mm) 1 Bolt 3 Bolt Washer 2 Tightening Knob Screw 1 Sleeve Note: Please allow slightly errors due to manual measurement and different monitors.