Ware Friction Block

These sliders were installed with the building back in 1973. They are original to the windows and allow the windows to be opened by sliding in the groove on the frame.

Hello, I'm trying to find this part. Do y'all carry it? It's what the sash pivots put on and stays on the track...it is a pretty old window so I haven't been able to find it elsewhere.

sorry, I don't have much information on this. It's from an older aluminum awning window, single glazed in a commercial building built in 1976. the awning is the center lite with a fixed lite above and below.