These are 4 types of Rubber Drill Bit bearings? 4 different sizes to match different sizes of nail drill sanding cap. Excellent durability and cutting performance.<br /><br />Features:<br />4 different sizes to match different sizes of nail drill sanding cap.<br />Antibacterial. Resistance of acid? alkali and heat. No clogging.<br />Very fine grain help polishing exquisite and smooth nails? for finger nails and toe nails.<br />Excellent durability and cutting performance. Improvement of customers&#39; feel.<br />Reusable? eye-catching appearance for easy identification.<br /><br />Specification:<br />Type: Drill Bit bearings<br />Color: Black<br />Material: Rubber<br />Model: 7mm? 10mm? 13mm? 16mm (optional)<br />Item size: 4.2 * 0.7cm / 1.6 * 0.2in<br />Item weight: 4g / 0.15oz<br />Package size: 8 * 6 * 1cm / 3.1 * 2.4 * 0.4in<br />Package weight: 4.5g / 0.2oz<br /><br />Package List:<br />2 * Drill Bit bearings<br><img src="http://img.tomtop.com/product/xy/2000/2000/p/gu1/W/1/W4375-1/W4375-1-1-db49-px3v.jpg" /><br>$$<img src="http://img.tomtop.com/product/xy/2000/2000/p/gu1/W/1/W4375-1/W4375-1-1-db49-qDiu.jpg" /><br>$$<img src="http://img.tomtop.com/product/xy/2000/2000/p/gu1/W/1/W4375-1/W4375-1-1-db49-Xy6o.jpg" /><br>$$<img src="http://img.tomtop.com/product/xy/2000/2000/p/gu1/W/1/W4375-1/W4375-1-1-db49-Hq8Z.jpg" /><br>$$<img src="http://img.tomtop.com/product/xy/2000/2000/p/gu1/W/1/W4375-1/W4375-1-1-db49-J0LW.jpg" /><br>$$<img src="http://img.tomtop.com/product/xy/2000/2000/p/gu1/W/1/W4375-1/W4375-1-1-db49-Bc1e.jpg" /><br>$$<img src="http://img.tomtop.com/product/xy/2000/2000/p/gu1/W/1/W4375-1/W4375-1-1-db49-omXR.jpg" /><br>$$<img src="http://img.tomtop.com/product/xy/2000/2000/p/gu1/W/1/W4375-1/W4375-1-1-db49-1YJ8.jpg" /><br>$$<img src="http://img.tomtop.com/product/xy/2000/2000/p/gu1/W/1/W4375-1/W4375-1-1-db49-n3ZL.jpg" /><br>