PVC Foundation Vent with no jamb/recessed louver box. 
Overall depth is 1-1/2". 
Square Edge Trim: 1-1/2" X 1-1/2"
Constructed using high-quality PVC adhesive for long-term durability. Made from exterior-grade PVC for lasting performance and resistance to moisture and decay. The open-louver (functional) option includes integrated aluminum mesh screening for added ventilation protection.