CRL 1-1/4" Tandem Steel Ball Bearing Roller Assembly for Andersen Doors Fits Andersen Patio Doors. Roller assembly, 1-1/4", Steel Ball Bearing, Adjustable Ships as one tandem roller, Andersen doors use two tandem rollers per operating door panel. Genuine Andersen Tandem Wheel available, search for: B00EOTPCEM