The 15 Series EntryGard Operators have a high-pressure die-cast zinc base that is E-Gard coated. The gears and drive worm are made of hardened steel. The #15.731 Dual Arm Operators are designed for windows 20" to 32" wide up to 60" high with a maximum sash weight of 60 lbs. We would expect you to find 20810 or 20544 on the linkage arm, which measures 4-7/16" overall length. Other common numbers we would expect to find are 31538, 31539, 30841, 30842, 30472, 30470, 20810, or 20544.
Left Hand Shown
The most popular unit in this size is the 15.10 which as a up link on the small arm. please order a 15.101 for up link.
Order stud bracket, cover and handle separately if needed (see related products below). Use an entrygard cover. Any handle style will fit.