2-7/8" Short Arm Length

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 #15.151 Dual Arm Operators are designed for windows 18" to 28" wide up to 52" high. We would expect you to find 20748 on the linkage arm, which measures 2-7/8" overall length. Other common numbers we would expect to find are 31538, 31539, 30841, 30842, 30472, 30470 Left hand shown. To determine hand of operator, if your sash lock (window lock), is on the left, you would use a left hand operator. And if your sash lock is on the right, you would order the right hand operator. Order stud bracket, cover and handle separately if needed (see related products below). Use an entrygard cover. Any handle style will fit.