![Perko Clam Shell Ventilator - Chrome Plated Brass - 4" x 3-3/4" [0339DP0CHR] - Bulluna.com](http://www.bulluna.com/cdn/shop/products/55827XL_{width}x.jpg?v=1618276371)
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Clam Shell Ventilator - Chrome Plated Brass - 4" x 3-3/4"
Specs:
- Chrome Plated Brass
- Dimensions Base: 4" x 3-3/4"
- Width Opening: 2-1/2"
- Height Opening: 1-5/8"
- Screw Size: #6