This is a large, 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.
I do not have Hex Fittings for this soft line.
This soft line equals the following equivalent 1:1 size at each scale.
1/25 scale = 4" .
1/16 scale = 2 1/2" Excellent size for Roll Bar Padding due to the thin wall - slice it down the middle with an x-acto knife and put it over your chassis tubing
1/12 scale = 1 7/8"
1/8 scale = 1 1/4"
For 1/12 and 1/8 scales, typical uses are radiator hoses and larger fuel lines.
This soft rubber line is easy to bend and shape to your installation.
Each package contains one coil of .157 x 1' rubber tubing