This is a direct replacement for all E-S 1600 arms* starting in 2016. The E-S 1600 arm is recommended for gates that are up to 14 feet in length or 800 lbs.
*The E-S 1600 and the E-S 1600L are two different sizes for separate applications. Please see the ES- 1600L replacement arm if you are replacing your 1600L.