This is a soft, solid rubber line that bends easily and smoothly.  It's able to bend at a sharp angle without kinking.

This makes perfect spark plug cable for 1/12 scale.  It drapes natually and looks proportional to the larger engine. 

See Hex Fittings sized at .045 for this soft line.

This soft line equals the following equivalent 1:1 size at each scale.

1/25 scale = 1"
1/16 scale = 5/8"
1/12 scale = 1/2"
1/8 scale  = 5/16"

Depending on your scale, typical uses are electrical cables, oil and fuel lines, small coolant hoses, as well as heater & A/C hoses or other smaller transfer lines.

This soft rubber line is easy to bend and shape to your installation. 

Each package contains one coil of .039 x 18" rubber tubing