Solid Structure- The ceiling mechanical bracket is made of rubber and steel, which can the resonance zone and has good shock absorption and noise reduction effects. Steel enhances durability, is to pressure, rust, , and deformation, and can be used for a long time. Effective Sound Insulation- The vibration isolator can absorb and isolate the vibration and impact between the ground or wall, thereby reducing noise and allowing you to experience a quiet and comfortable atmosphere. Instruction--The vibration isolator is easy to install, and the mounting base is pre-drilled with screw holes and equipped with sufficient nuts and washers to quick installation without complicated tools or professional skills. Ceiling mechanical vibration damping mounts have strong shock resistance. It can be easily installed on various surfaces including ceilings, floors, pipes, walls, HVAC, etc. Widely used in bedrooms, home theaters, karaoke rooms, concert , recording studios, conference rooms, bars, etc. Color: Red Material: Metal Size: 87 x 60 x 32 mm/ 3.43 x 2.36 x 1.26 Inch (LxWxH); Bolt Thread Size: M8 x 1.25mm; Load Capacity: Up to 20 kg / 44.09 lbs; Package Contents: 1 set x ceiling thumper Only the above package content, other products are not included. Note: Light reflection 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.