Alcoa vinyl window pivot shoe

The company that made your window balance and pivot shoe has gone out of business. We have a pivot shoe, the 15-173, which is 31/32" wide by 9/16" thick. I think that should work for your Alcoa window. 

The plastic tube balance diameter should be 9/16", so you can use Series 600 for them. Just note that our balance tubes are metal, not plastic. Finally, our 75-006 charging tool would be very helpful in charging and attaching the spiral to the pivot shoes.