This Vibrant 4 Ply Reinforced Silicone Transition Connector is a durable and reliable solution for connecting two sections of tubing. It is 4 inches in internal diameter, 4.5 inches in external diameter, and 3 inches long. It is made of high-quality silicone with four layers of reinforcement for added strength and durability. It is also designed to resist high temperatures and is available in black. This connector is ideal for a variety of automotive, industrial, and commercial applications.