Lineset Duct Adapter Fitting;Type Flexible;Applicable Standard UL-94V-0;Material PVC;Size 3-1/2";Used On Lineset Ducting System;Includes (4) #6 x 3/4" Stainless Steel Screw;Overall Dimension 3-1/8" Length x 3-7/8" Width x 2-3/4" Height;Color Gray;Temperature Rating 0 to 180 Deg F;Packaging Quantity 6 per Carton;Warranty 1 Year Limited