The plastic top guide measures 1" wide across the wings, 3/4" deep from the face to the back of the channel, 1 1/4" from the tip of the guide (not including the small tabs inside the rail.
The plastic bottom shoe measures 1" wide across the wings, 7/8" deep from the face to the back of the shoe, 1" from the bottom of the shoe to the plastic tips at the back of the channel.
I took the guide and shoe out of the old balance and did some measurements. The part numbers and measurements I matched up were as follows:
15-029 - 7/8" depth Channel Balance Winged Shoe
19-005 - Channel Balance Winged Top
The channel measures 29" long without the shoe or top guide. The stamp on the metal reads 28B USB.
![Rail-Top-Guide](images/pictures/2022/09/597151.jpg)
![Rail-Bottom-Shoe](images/pictures/2022/09/597152.jpg)