AEM's Universal Gauge Boot is able to protect all of your 52mm gauges to maximize their performance and longevity by repelling dirt, water, dust and other contaminants. This gauge boot is made of silicone rubber and is designed to stretch onto the back virtually any 52mm gauge, acting like a wet suit or shower cap for the gauge. Please note that while the gauge boot provides a barrier from water and contaminants IT IS NOT WATER PROOF!