The concealed 2030 Series PACER is a heavy duty closer designed to fit in a narrow, minimum 1-3/4" aluminum transom. The single lever arm and roller assembly provide smooth, quiet door control. Materials for all 2030 series include a cast iron cylinder, a one-piece forged steel 1-3/8" piston, an 11/16" diameter double heat treated pinion journal, and a high-efficiency, full-complement, low-friction bearing. Spring power and latch speed adjustments are independent for either swing. UL and cUL listed for self-closing doors without hold-open. The mount is concealed; an aluminum frame requires minimum 1-3/4" x 4" tube. Select closer based on width of door. ï¿½2030 Series cylinders available in size 1, 2, 3, 4, or 5.ï¿½ Closing power of all 2030 Series closers may be increased 35 percent. Specify next higher size closer where strong drafts exist.