Vibrant Performance Aramid Reinforced Silicone Transition Hose Couplers are built to connect tubing of different sizes while maintaining strength, flexibility, and reliability. Each coupler is layered with high temperature resistant aramid fabric between the silicone for exceptional heat resistance and durability, even in demanding automotive environments. Designed specifically for water, coolant, and air systems, they deliver consistent performance in both street and racing applications. Each coupler is sold individually.