This Imperial Increaser/Reducer is used to effectively reduce or increase the diameter of galvanized round pipe when making connections. The no-crimp connector is used to transition from 8-in pipe to 7-in pipe in an HVAC system. It features hemmed collar edges for strength and a snug fit, and is made from 28-gauge galvanized steel for durability. This increaser/reducer is easy to install and is suitable for use in most heating, venting and air conditioning applications.