This is a soft rubber tubing (hollow) that is easily configured to the space you have. It's able to bend at a sharp angle without kinking or folding.
See Hex Fittings sized at .080 for this soft line.
This soft line equals the following equivalent 1:1 size at each scale.
1/25 scale = 1 3/4"
1/16 scale = 1"
1/12 scale = 13/16"
1/8 scale = 9/16"
Depending on your scale, typical uses are coolant hoses and fuel lines, as well as heater & A/C hoses or other larger transfer lines.
This soft rubber line is easy to bend and shape to your installation.
Each package contains one coil of .066 x 18" rubber tubing