Vibrant Performance Aramid Reinforced Silicone Straight Hose Couplers feature a 4-ply Aramid reinforcement fabric between each layer of silicone which allows for an impressive operating temperature range of -75 Degrees F to 392 Degrees F (-60 Degrees C to 200 Degrees C). Our Straight Hose couplers are commonly found off of turbo compressor housings, intercooler end tanks and charge pipe assemblies. Suitable for water, coolant and air service only.