This is a direct replacement for all E-S 1600L arms* starting in 2016. The E-S 1600L arm is recommended for gates that are longer that 14 feet and up to 20 feet in length or 1000 lbs.
*The E-S 1600 and the E-S 1600L are two different sizes for separate applications. Please see the E-S 1600 replacement arm if you are replacing your 1600.