DEI Titanium Protect-A-Sleeve with LR Technology offers the best possible sleeve protection on the market today. Developed specifically for any application where extreme high heat is present, these Titanium sleeves will protect wires, lines and cables when exposed up to 1800 degrees Fahrenheit direct heat or 2500 degrees Fahrenheit radiant heat. Developed with DEI's proprietary LR Technology, these high temperature rated sleeves provide superior thermal protection for street vehicles or race engines, protecting fuel, oil lines, spark plug and electrical wires from direct or under hood radiant heat. The 1/2" interior diameter sleeves will fit many of today's larger diameter spark plug wires for protection against hot exhaust manifolds and headers. Water and heat resistant, they are also ideal for Powersports - ATV/UTV, motorcycle, personal watercraft, snowmobiles, and marine use.