Vented Plinth Base Covers install in the front and rear openings of a standard plinth base in place of Solid Covers. Vented covers allow air to circulate into the enclosure. Vented Plinth Base Covers are available in 100-mm and 200-mm heights. These covers include all necessary mounting hardware. A standard plinth base must be ordered in combination with Vented Plinth Base covers to form a Vented Plinth Base. If using a gland plate with the Vented Plinth Base, order a vented gland plate to provide air circulation through the bottom of the enclosure.