High Quality and Strength for your using <br> Size: M4<br> Material: Aluminum Alloy<br> Top Diameter: 7.4mm<br> Bottom Inner Diameter: 4mm<br> Bottom Outer Diameter: 11.8mm<br> Height: 4.5mm<br> <br> <b>Package Contents: </b><br> 50 pcs M4 Cone Washer <br> <br> If for any reason you are unhappy with any product, please do not hesitate to contact JLMetal. We take full ownership and responsibility for the quality of our products and will do our very best to solve your problem quickly and efficiently! <br>