SELKIRK Corp 103080 Universal Fem Adapter, 3-Inch Product Description 3" inch, 3RV-UAF, Universal Female Adapter. Designed for round type B gas vent. Allows Metalbestos B-vent connectors to be used in conjunction with other brands of existing vent. Used to adapt to Metalbestos pipe toward appliance. Adjustable flange fits any wall. Permanent stainless steel seat. From the Manufacturer 3" inch, 3RV-UAF, Universal Female Adapter. Designed for round type B gas vent. Allows Metalbestos B-vent connectors to be used in conjunction with other brands of existing vent. Used to adapt to Metalbestos pipe toward appliance. Adjustable flange fits any wall. Permanent stainless steel seat. Features Manufactured in china Easy to use Highly durable 3" inch, 3RV-UAF, Universal Female Adapter Designed for round type B gas vent Allows Metalbestos B-vent connectors to be used in conjunction with other brands of existing vent Used to adapt to Metalbestos pipe toward appliance Adjustable flange fits any wall USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.