Cool down with JC Performance Cool Sleeves. Available in multiple lengths and diameters to fit: wiring, fuel lines, brake lines, intake tubes, intercooler pipes, spark plug wires, battery cables, A/C hoses, radiator hoses and more. Easy to trim. Hook and Loop fastens right over existing wires, cables and hoses, Sewn Seam slides over wires, cables and hoses. For best results seal the sleeves at each end with adhesive tape (Included), shrink tube or use stainless cable ties. To ensure a proper fit, allow extra room for bends (for example: a 90º bend in a 3/4" tube will NOT fit in 3/4" I.D. Sleeve, In this case you would need 1" I.D. or higher) I.D.