SOSS 216 Invisible Hinge for Wood or Metal Applications 20 min. Fire Rated Minimum Door Thickness: 1-3/8 in.
SOSS 218 Invisible Hinge for Wood or Metal Applications 20 min. Fire Rated Minimum Door Thickness: 1-3/4 in.
SOSS 220 Invisible Hinge for Wood or Metal Applications 20 min. Fire Rated Minimum Door Thickness: 2 in.