This HPS Performance 4-ply aramid reinforced silicone coupler is designed to meet and exceed SAEJ20 industry standards. It is ideal for ultra high temperature and heavy duty pressure connections. Unlike traditional rubber couplers that are sold in auto parts stores, these are engineered with 3 stainless steel rings at the middle of the hose to provide additional reinforcement under extreme high pressure conditions. This product meets a wide range of high-performance requirements and is designed for use in marine, industrial, and custom turbo or intercooler piping fabrication applications. Temperature range: -65 degrees to +500 degrees Fahrenheit (260C). This hot side bellow is ideal for handling slight misalignments and isolating vibration between hose ends. REMARK: Not compatible with fuel or oil.