Stanley Hardware S171-543 CD1764 Heavy Duty Air-Controlled Door Closer in Black Coated Authorized Replacement from National Hardware Stock #N100-038 Designed for use on out swing wood or metal doors up to 1-3/4 inch thick Fully adjustable door closing speed and permanently lubricated to extend operating life Supplied with handy "hold-open" washer Manufactured with steel rod, tube and brackets Manufactured with steel rod, tube and brackets Designed for use on out swing wood or metal doors up to 1-3/4 inch thick Torsion bar and large air controlled 1-1/2 inch tube combine to provide twice the latching power of a standard duty closer