Prime-Line Sliding Screen Door 1-1/4 Inch Arcadia Style Tension Roller 2-Pack B 515This is an Arcadia style roller assembly used by Arcadia doors as well as a variety of other sliding patio door manufacturers. This is currently a very popular design amongst patio door manufacturers in today's market place. It has a wire tension spring and comes with a 1 1 4 in. high density polyethylene roller and fits onto the Prime Line part B 569 corner insert. Often used on the top as well as the bottom of the sliding screen door.