Specification: 100mm x 45mm x 50mm or 4 inch x 1.8 inch x 2 inch; 5/16inch (M8) bolt size; Weight: 0.4kg. Max load: 50kg (110lbs); The recommended distance of each two isolators is 24 inch, e.g. 63~99 isolators are needed for a room aera of 215~322 sq ft.<br> Easy To Install: The base has 1 bolt hole on base for rigid mounting when used for supporting machinery, easy installation on ceilings, floors, walls, ducts, etc.<br> Wide Application: The shock absorber can be used in bedroom, studios, home theaters, houses, hotels, bars, karaoke room etc. Can be mounted to ceilings, walls, pumps.<br> <br> Colour: Black + Red<br> Material: Plastic + Metal<br> <br> Package Contents:<br> 4 * Capacity Spring Vibration Isolators<br> <br> Only the above package content, other products are not included.<br> 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.