Specification: 316 GB97 DIN125 ISO7089 Size: M8 M10 M12 M14 M16 M18 M20 M24 M27 M30 M33 M36 M39 Material: 316 A4-70 stainless steel FAQ: 1.Wholesalers and retailers are welcomed. For wholesale,we will offer discount or free express shipping which only takes short time to arrive. If you are a retailer and want make your own business, we could send the goods to your customers directly and won't leave information about us if you'd like to. 2.What should I do if I don't receive my item? Please contact us first, we will track your item. If you can't receive it, we will full refund or resend it for you. We are honest seller, so don't worry. 3.If the products have problems how to do it? Please contact with us in time, we will help you solve it.