Standard Covers for Series 6 Tray are flat (no flanges). If you want ventilated covers, add the suffix "-V" for louvered ventilation.
Covers can be held to tray with Caddy Beam Clamp 9SCB424BC or with 9STK774 Self-Drilling / Tapping screws. Cover Hold Downs must be ordered separately. Covers to 24" widths are made from 20-gauge G-90 coated galvanized steel or 0.040" thick 5052H32 aluminum sheet.