Paul from SWISCO responded:
April 25, 2018
Unfortunately for the 1/2" deep coil springs, the manufacturer changed their nylon covers to a style with a flat top. They suggest when changing from the curved top to square top to lower the placement of the coil springs low enough to be below the top tilt latch when the lower sash is in the closed position. We no longer have any curve top housing in our inventory. |