Sold by the foot.

Designed to fit wiring, fuel lines, brake lines, intake tubes, intercooler pipes, spark plug wires, battery cables, A/C hoses, radiator hoses and more.
1st Quality Fiberglass, Silicone Bonded to an Aluminum Alloy outer skin
Designed to provide maximum heat reflectivity while also protecting from chemical, oil leaks & spills, dirt, road grime and other underhood hazards
Pliable enough to be shaped to fit the tightest bends.
Better than heavy silicone tape, sleeves are lightweight, easy to install and easy to remove

Just over 3/4" (19mm) inside diameter.

Rated for Extreme Heat:
Reflects over 90 % of Radiant Heat
Continuous exposure to 1100 degrees
Intermittent exposure to 2000 degrees
Direct contact to surfaces up to 500 degrees
Fireproof, Oil Resistant, Light Weight

For best results seal the sleeves at each end with adhesive foil tape, shrink tube or stainless steel cable ties.