Material
ASTM-A653 CS Type B Galvanized Steel G-30 Coating LFQ Chemical Treatment

Gauge
28GA

Assembly-Wall cap is spot welded together

Options
300: with damper and 4 1/4″ ext- STANDARD
300S: with screen only and 4 1/4″ ext
300SD: with screen and damper and 4 1/4″ ext
300D: with damper and 12″ extension
300DSD: with screen, damper and 12″ extension