This is a nice choice for an external vent cap for your Nature's Head.

Polished 304 sheet stainless steel.
Features a screw down knob to open and close the vent.
Includes a stainless steel mesh mosquito screen.

Price includes FREE SHIPPING if ordering a toilet. If you are not ordering a toilet, a small shipping charge will apply. Please call me toll free to discuss 1 888 361 0014.