Designed for severe duty use, the Ultra 47(TM) Starter Shield offers the highest level of protection for starters from potential failure caused by under hood heat soak conditions. Constructed of two layers of material, a highly reflective outer layer combined with a high heat inner layer. Able to withstand direct heat of up to 1350°F, Ultra 47(TM) Shield is the perfect choice for high heat applications where engine heat soak is a problem. 7 in.W x 24 in.L Size Hook & loop fastening system Length can be trimmed to size