Complementing our range for the North American market is the I50N, a heavy duty overhead door closer with force size 1 to 6. Complying with ADA barrier-free regulations, this back-check and delay-equipped model can satisfy all installation needs, including heavy exterior doors. While sharing the looks and mounting position/holes of market-leader LCN’s 4040/4041, the I50N uses a novel one-piece cast iron body that results in an even more durable design. Additionally, thanks to our innovative valve design, all necessary adjustments can be done from the front even after installation. Add to that our sleek clip-on/screw-on hybrid cover and our extra arm options, and you got yourself a one-stop solution at an extremely competitive price point.