Protect-A-Boots are made from a high temperature resistant glass fiber material and treated with a proprietary coating, Protect-A-Boots provide spark plug boot and wire protection from extreme under hood heat. Withstands 1200°F direct continuous heat Helps prevent burn-through, hardening and cracking of boots Universal-fits most straight or angled boots Installs in seconds Double-wall construction for added durability Non-flammable & protects against chemicals & resists water