General description Quick and easy to install, this Roof RV Ventilation Cap features a mushroom head shape designed for motorhomes. It effectively keeps your ventilation system looking great while providing reliable performance. Technical specifications Overall size: 134.5mm x 71.5mm x 80mm Material: Impact resistant Polypropylene (PP) Fits up to 2 inch diameter with 2-1/2 inch projection vent pipes Compatibility and accessories Includes a cap that can be locked or removed with a twist of the wrist, no tools required