Items may be hollowed out in the backs. Some may be made as assemblies. Items whose stock numbers start with F are only Flat Trim to surround a specific Vent, not the Vent itself. Quantity discounts available.
A Siding Rabbet (continuous notch - see drawing above) can be added to the back edge any vent. Once a vent is rabbeted it cannot be returned.
** Items marked with double asterisk require MOTOR FREIGHT shipping due to their size and may require extra fabrication time. Please inquire when ordering.