Base Can End Cap Base Can Rail – Galvanized Base Cans Dedicated Electronic Air Cleaner Filter Frames (Honeywell) Dedicated Electronic Air Cleaner Filter Frames (White-Rodgers) Duct Transitions – Air Cleaners Filter Access Doors Filter Base – Fresh Air Filter Bases – 1"-2" and 1"-4" Filter Bases – Economy Filter Bases – Fan Coil – 1"-2" and 1"-4" Filter Bases – Multi-Position Filter Frames – 1" wide with door Filter Frames – 2" wide with 2" door Filter Frames – 3" wide with 1" door Filter Frames – 4-1/4" wide with 3-1/2" door Filter Frames – 6-3/4" wide with 1" door Filter Frames – 6-3/4" wide with 4" door Filter Frames – 6-3/4" wide, flange out at 90 with 5" door Filter Frames – 7" wide with clip on door Filter Frames – Flange out at 90 with 1" door Furnace Coil Adapters Furnace Filter Rack – Downflow Furnace Plenums – 1" and 2" Insulated Furnace Plenums – 1/2" Insulated – 3 Sided Furnace Plenums – Standard – With Cap Plenum Take Offs (Unassembled) – 4" and 2" Rise Plenum Take Offs (Unassembled) – Straight Plenum Take Offs (Unassembled) – Tapered – 4" and 2" Rise