Check the listing for details. Andersen Tandem Roller For Sliding Door Steel Tandem Roller With Bracket. Color: Gold, Condition: New. Listed at 17.68 USD. Andersen steel tandem roller assembly with bracket for Perma-Shield gliding doors manufactured 1982 - present. Two tandem roller assemblies are attached at the bottom surface of the operating panel and are required to allow for the panel to roll. Dual ball bearing rollers on bottom of door panels provide smooth gliding operation with self-contained leveling adjusters. Works With: 200 Series Narroline® Gliding 200 Series Perma-Shield® Gliding 400 Series Frenchwood® Gliding To check the roller adjustment: 1. Open the door several inches and insert a pencil between the inside and outside. 2. Close the door on the pencil. 3. The gap between the door frame and the sliding panel should be the same from the top to bottom of door. 4. If the gap is larger or smaller at the top then you rollers need to be adjusted. Priced EACH - Should be replaced in pairs Helpful Links: Guide to Replacing Rollers in Andersen Sliding/Gliding Door Video: How to Replace Rollers in Andersen Sliding/Gliding Door Related Parts: 1997062 - Tandem Roller Assembly without Bracket 2573517 - Tandem Roller for New Style 8' Doors (1998 - present) 0903433 - Roller Adjustment Hole Plug in Sandstone