Upper Flange Spec: Inner dia. 2.5" / outer dia. 3.1"
Lower Flange Spec: Inner dia. 2.5" / outer dia. 3.1"
Pipe diameter: 2.5"
All items are Brand New unless stated otherwise on the listing. We sell DIY (Do It Yourself) Items with a few exceptions. We take no responsibility in teaching you how to install. Professional installation is strongly recommended.