This 72” wide bi-parting electric slider has one of the largest service openings in the drive-thru arena. With a generous 29-1/2” (w) x 32” (h) opening, you can effectively operate with two workers in one window or pass large items such as dry cleaning, large pizza boxes, auto parts, etc. All electric windows come standard with the thru-beam sensor. However, we do offer these with the push button operation as well. We also make a manual, self-closing version of this window (Model #BPSC-7241) as well as a 36” tall unit (Model #BP-7236E).