Look no further. Great item quality, that's solidly built. Best of all, its very affordable price. Buy without delay.<br /><br />Material: rubber<br />Height: about 21mm<br />Inner diameter: about 7mm<br /><br />4 x Anti Vibration Ball<br /><img src="http://img6.eachbuyer.com/x19/p44/bh508_01.jpg" />                                                        <img src="http://img6.eachbuyer.com/x19/p44/bh507_01.jpg" />