Standard new 4030 series closer is shipped with forged regular arm,  metal cover and wood/self-tapping machine screw pack.   Non-sized (1-4) 4031 cylinder for exterior doors to 36” (914 mm) and interior doors  to 48” (1219 mm).  Closer mounts hinge side, top jamb, and parallel arm, on either right or left
swinging doors.  Closer meets ADA requirements.