This Vibrant 4 Ply Reinforced Silicone Transition Connector is a durable and reliable pipe connector, designed to join two pipes of different sizes. It is 3.25in I.D. x 3.5in I.D. x 3in long and is made from black silicone that is four-ply reinforced for extra strength and flexibility. It is ideal for joining pipes in automotive, marine, and industrial applications, and is resistant to extreme temperatures, ozone, and UV rays. It is also resistant to oil, water, and antifreeze, making it a great choice for a variety of applications.