304 Stainless Steel Round Rings Heavy Duty Solid Metal O Ring Welded Smooth. Heavy Duty Welded Smooth Solid Round Rings. Material: 304 Stainless Steel. Wire Diameter:3mm, 4mm, 5mm, 6mm, 8mm, 10mm. Solid type, round and firm surface, shock light treatment, no burr. Good mechanical properties, such as rust resistance, corrosion resistance, heat resistance, low temperature strength, etc. Strong, durable and not easy to break the weld. Can be used with steel wire rope and metal chain, etc. A variety of specifications are available. All products in our store are elaborately made. We care about our valued buyers, if you have any questions, our Customer Service staff will be very glad to help you. We try our best to reply to your emails as soon as possible, however, due to the high volume of daily incoming emails and time zone difference, we may not be able to reply to your emails immediately. Please contact me before you return it. Feedback is very important to us. For the functional products in our shop, we make sure that the functions are the same as the description. About the product colour:Because of the different light and environment when the product is photographed, In a few instances the colour of the product may have a little colour difference with the actual colour of the product, I hope you can understand.