Genuine GM NOS, this sale is for 2 of them, one for each door on 1969 Chevrolet Impala & Caprice 2 door hardtops and Convertibles. These are Front Door Window Guide Rollers that go to the rear of the doors, left or right side. 

GM group 10.792, Part #8727914.

There is nothing like genuine GM NOS when you can find it!