Product Details UL Fire Rated Door Closer UL Door Closer Certificate No.: R38970 Door Closers are devices that automatically close a door after it has been opened. Their primary purpose is to comply with fire safety, ensuring that fire doors are never left opened in a way that might facilitate the spread of a fire.Door Closers are devices that automatically close a door after it has been opened. Their primary purpose is to comply with fire safety, ensuring that fire doors are never left opened in a way that might facilitate the spread of a fire. Material: Cast Iron Finish: Silver grey Applicable door weight: 65-150KGS Max Opening Angle: 115 degree Function: Delayed action, adjustable back check, hold open function