PVC Coated Zinc Hub Connector with Thermoplastic Insulated Throat, Pipe Size 4 Inch/103 Metric, Overall Diameter 5.50 Inch/139.70 Millimeters, Maximum Panel Thickness 0.25 Inch/6.35 Millimeters, Throat Diameter 3.88 Inch/98.55 Millimeters, Nitrile Rubber (Buna-N) Sealing Ring, Dark Gray