BO OBX Reinforced Silicone Hump Coupler - Blue 2.50" Diameter (2-Pack) Measurements: 2.50" inlet/outlet at 3.5" in length with 5mm wall thickness Includes 2 silicone couplers per order Made from silicone and reinforced with 4 layers of nylon wrapping Pressure and heat resistant from -165 to 350 Farenheit Picture shown for reference only