Cush-N-Stop Arm is a heavy duty parallel arm with a positive stop for high volume traffic or potentially abusive installation conditions. • Push side parallel arm installation only SCUSH/SCNS - The SCUSH/SCNS is a spring stop arm, it has more cushion at the stopping point than the dead stop CUSH/CNS arm and stops the door from being opened past a predetermined degree of open. The spring feature occurs 5° before the dead stop point. The spring stop point is not adjustable, it is set by templating. SCUSH arm closers can only be mounted as a Push Side parallel arm installation.