The Rix Roof Vents are designed to represent many types of vents found on
buildings and factories all across the country. The Rix Roof Vents are made so
that a variety of different styles can be made. The swivel base allows the vents
to remain plum when mounted on a peaked roof. Kit includes enough parts to
produce a total of eight (8) vents. Four (4) swivel bases are also included.