This view of the patented Ultra CSV ® crawl space vent shows you what the vent would look like on the side of the foundation.  The face plate and summer door frames are made out of heavy duty ABS plastic.  The color is dove gray and can be painted with the appropriate paint by the customer if they so desire.  The vent is plastic injected molded and during this process UV properties have been added.  The screen is a heavy duty galvanized steel for durability and to keep vermin out of your crawl space.  It is recommended that you use candle wax, bees wax, or a small dab of never seize on the rods that the knurled nuts screw into which holds the doors in place.  Doing this at least once a year will ensure the ability to screw the knurled nuts on and off simply using your fingers.  The knurled nuts should be tightened only finger tight.