The 4110 is LCN's best performing parallel arm mounted heavy duty surface door closer with an adjustable spring and possible hold open point beyond 140 degrees, meeting ADA requirements. Backed by a 30 year warranty, the cast iron body and all weather fluid offer versatility in high traffic applications. They feature a standard plastic cover and the LCN Green Dial spring force indicator, which takes the guesswork out of adjustment. Cast iron cylinder with full-complement bearing, 1-1/2" diameter piston, 11/16" diameter double heat-treated steel pinion journal. Peel-n-stick template with 2-1/2" x 6" mounting hole pattern. Not designed for exterior mounting or exposure to the elements.