High density polystyrene construction rust proof, scratch resistant Easy to clean Three position 100% damper shut-off Knockout at each end for ceiling installation.

Highlights:

• Material: Polystyrene
• Color: White
• Installation type: Ceiling
• Duct opening height: 4 inch
• Duct opening width: 10 inch
• High density polystyrene construction
• Rust-proof, scratch-resistant
• Easy to clean
• Three-position 100% damper shut-off
• Knockout at each end for ceiling installation