To protect wiring. Can be used to customize your electronic device by choosing the colors you desire. How To Video: https://youtu.be/uB7oDs-hYL4 This size should work on a 200x200mm print bed at 45 degree angle. Choose a single wrap or print multiples of the wrap that will connect/extend. Use whatever size piping you have or need. I used a 1/4" OD brass tube or apx 6mm OD. Please use heat resistant gloves when spiraling. (OD = outside diameter)