This Vibrant 4 Ply Reinforced Silicone 90 degree Transition Elbow is a great way to join two sections of tubing together. It is made from a premium quality, 4 ply reinforced silicone material that provides superior strength and durability. It has an inner diameter of 2.5 inches and an outer diameter of 2.75 inches and is available in black. This elbow is perfect for a variety of applications, including turbo and intercooler piping, radiator and heater core connections, and vacuum and boost lines.