Perko Clam Shell Ventilator - Chrome Plated Brass - 4" x 3-3/4"

Perko Clam Shell Ventilator - Chrome Plated Brass - 4" x 3-3/4". Perko's 0339DP0CHR Clam Shell Ventilator is available in a chrome-plated brass finish. It requires a #6 screw size for installation. The base dimensions of this Clam Shell Ventilator is as follows: 4" x 3-3/4". The opening width is 2-1/2" and the opening height is 1-5/8". Built with quality materials for long lasting durability. Check with manufacturer for proper fit before you purchase. Specifications for Perko Clam Shell Ventilat