1 Buy = 2 Hydrofarm 4 Inch In-line Hydroponic Fans! The 4 Inch ACDF4 **Hydrofarm Inline Fan** offers innovation and performance at a great price. With a full line of fans to meet your needs, all Active Air Fans are quiet in operation. They have a durable ceramic-coated metal housing and a high quality molded impeller. The Hydrofarm ACDF4 Active Air Fan has UL recognized components. The mounting brackets are included. On top of offering you the 4 Inch ACDF4 **Hydrofarm Inline Fan** at a great price, we provide free ground shipping on all orders. VMInnovations is an authorized Hydrofarm dealer selling new, warranted products! Please see our other listings, we offer a wide variety of indoor gardening products!