Norcold Inc. Refrigerators 622293CBW Polar White Roof Vent Cap Go to amazon.com Related posts Top 6 recommendation recreational vehicle refrigerator FeatureVents & Catches Norcold Vent Cap White 622293Cbw Norcold DescriptionA low profile plastic roof vent that fits all models. Cutout: 5.25-inch x 24-inch.