This is a KIT .. to refurbish the window roller tracks , washers, roller retainers and insulators, plus the tensioners for the front.
For the 70-81 Firebird TA & Camaro Series..
Do clean up the tracks.. grab a tooth brush..(don't use the wifes.. not good for ongoing relations...) use some white grease to lube this and clean up the tracks while your doing the job ONCE...