Imperial 4"x3" Aluminum Vent Decreaser for reducing the size of your vent pipe from 4" to 3". Crafted from durable aluminum, this decreaser ensures longevity and resistance to corrosion. Its compact design, with a 3-inch OAH and 4x3-inch diameter, allows for easy installation and seamless integration into your existing ventilation system.

• 4 in. x 3 in.
• Made of aluminum
• Used to reduce the size of a vent pipe from 4 in. to 3 in.