Vibrant Performance Aramid Reinforced Silicone Couplers are hand wrapped and feature 4-ply reinforcement, which allows our couplers to be capable of withstanding extreme temperatures and heavy duty pressure conditions without swelling or bursting. All Vibrant Performance reinforced hoses meet or exceed SAE J20 specifications, are suitable for coolant service and are UV and Ozone resistant. Not suitable for oil or fuel service, although custom hose solutions are available for such applications. Available in straight sections, transition hoses, h