Hi Savo, the ratings K, L and M refer to the wall thickness of copper tubing. Type K is the thickest, with L not as thick and M being the least thick. If you are just needing copper tubing for water applications, any of these will do. We recommend checking local plumbing code for which tubing is recommended for your application. We hope this helps with your project.
Hi Mcherri22, you can spray paint these pipes, just be sure to use a metallic spray paint so it adheres properly to the metal. We hope this helps with your purchase.
It has the Type M printed on the side.
No. It is rigid pipe and can't be coiled.