Andersen Lower Screen Roller Assembly (1991 to Present) 1 Pair - 1997310 by Andersen Windows This item replaces screen rollers that have adjustment holes on the edge of the screen frame. Nylon housing with a nylon concave wheel that measures 1-1/4" in diameter and 5/16" thick. Works with these patio door gliding screens manufactured from 1991 to Present. Works with top screen rollers 1997063. Pack of 2 wheels.