Ventev’s Replacement Doors for Interchangeable Door Hard Lid and V2 Ceiling Tile Mounts are constructed of powder-coated aluminum and meets NEC300-22 and 300-23 standards for installation in plenum/airhandling areas._x000D_  _x000D_  Every door is covered by the company's two-year warranty program. For questions or to purchase product contact a Regional Sales Executive at 800-851-4965 or sales@ventev.com