Soft Copper Tube Pipe Coil OD 1.8mm to 25mm Air Conditioning/Water/Gas-All Sizes. Made of copper material, which is lightweight, with high strength, good thermal conductivity, corrosion resistance, high-temperature resistance, ductility, and weather resistance. Can be used on various occasions. Commonly used in machinery, DIY projects, hobbies, crafts, building models, building decorations, frames, industrial, gardening products, and so on. Copper tubing can be welded and processed to different lengths according to your needs by using the right equipment. The surface of the copper tube is easy to be oxidized and it will have a little oxidation (not rustiness), but it does not affect the use. If you need a beautiful appearance, such as crafts, it is recommended to use fine sandpaper grinding. Grade:99.9% T2. System of Measurement: Metric. Thick:0.5mm – 2mm. D:1.8mm – 28mm. According to your choice. Select the sizes you want from the dropdown box. 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.