Replacement sliding window rollers. CCirca 1978. The channel is three-quarter inch wide and a half an inch deep. The broken piece of plastic base is 1" x 3/4 inch. The roller measures 1/2 inch Diameter and 1/4 inch width. The axle hole in the middle of the wheel is 3/16
Casey from SWISCO responded:
September 23, 2020
Hello,
I would recommend carefully comparing our 87-155 to an undamaged roller removed from one of your windows and see how the dimensions compare. Thanks for posting!