Thomas & Betts B1MGEXT-2 Carlon Gangable PVC Box Extender, 3-1/4" x 2-1/4", Blue (Pack of 2) Go to amazon.com Related posts Where to find receptacle extender? FeatureMaterial: Non-MetallicColor: BlueMounting Method: ScrewsStandard: E 11461 DescriptionGang able PVC box extender. For use with non-metallic boxes. Pack of 2.