New CNC machine + aluminum shock pad, Surface treatment: Anodized sandblasting, With replaceable rubber shock ring.With replaceable rubber suspension ring, rubber suspension can be removed, black rubber ring is not fixed.Tips: shock-absorbing apron removableInstallation----can be installed from the chassis inside, you can also use self-tapping screws from the outside of the chassis installation (for wood materials), the installation of screws to be self-contained.Diameter: 20mmHeight: 8mmScrew hole diameter: 3.5mmType: Speaker Feet PadItem Type:StandModel Number:M2008color:BlackMaterial:Aluminum alloy + rubberPackage Contents:4 x Speaker Feet PadOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.