The Camco RV Replace-All Plumbing Vent Cap Only fits up to a 2" pipe. It features spring tension attachment, which eliminates the need to replace the entire vent just because of a lost cap top.• Replaces lost or damaged RV plumbing vent caps• Fits up to a 2" plumbing vent pipe• Made with UV inhibitors to extend the life of your vent cap• Spring tension attachment eliminates the need to replace the entire vent• Vent cap only (base not included) Spring tension attachment eliminates the need to replace the entire vent Made with UV inhibitors to extend the life of the vent cap | Replace-All Plumbing Vent Cap Only, Polar White