Dundas Jafine Inc. 4" Dryer To Duct Connector D2DPX €¢ Safe and efficient way to connect your dryer transition duct to the back of your dryer €¢ Made of UL94 rated, flame-resistant plastic for a safe connection €¢ Prevents duct from being crushed €¢ Improves the air flow from the back of the dryer €¢ Friction fit to the dryer for an easy connection that does not require clamps or duct tape for attachment and can be easily removed for cleaning €¢ 4" diameter