Andersen&Acirc; Gliding Patio Door Tandem Roller Assembly (1982 to Present) Available in money saving 2 pack, search for: B00079FVMG Gliding door tandem roller assembly with bracket. Andersen rollers provide smooth gliding operation with self-contained leveling adjusters. When replacing rollers, we recommend replacing both rollers Works w/ 200 Series Narroline, 200 Series Perma-Shield and 400 Series Frenchwood Gliding Patio Doors