Description: Features: brand new and high quality. Made of metal, more durable and firmer. It can effectively protect your machine angle. It is easy to install. It can be used for professional stage speaker, metal bottom eye speaker, base bracket, support for seat, and speaker tray, etc. Specifications: Item Type: Professional Metal Stand Speaker Material: Metal Color: Black Size: (approx) Total Height: 85mm/3.35in Outside Diameter: 10.7cm/4.21in Middle Column Diameter: 4cm/1.57in Inner Hole Diameter: 3.6cm/1.42in Center Hole Distance of Screw Diagonal Center: 8.3cm/3.27in Screw Diameter: 0.7cm/0.26in Flat Thickness: 0.23cm/0.09in Quantity: 1 Set (1/2Pcs) (other accessories demo in the picture is not included) Note: 1.Transition: 1cm=10mm=0.39inch 2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: (No retail package) 1/2 Pcs X Professional Metal Stand Speaker