Prime-Line 1-1/4 in. Crossly Steel Ball Bearing Sliding Door Roller Assembly (4)

4 Rollers total. New in the package. This is an unique back diecast patio door roller assembly with a 1-1/4 inch concave steel ball bearing roller used on Crossly doors. It's unique diecast housing is 11/16 inch stepping down to 9/16 inch wide, 1-1/8 inch tall and 2-5/16 inch long with a flare width of 3/4 inch. The 9/16 inch wide rear design of the housing fits into the door rail held in place by a screw that engages the mounting hole in the back end. The adjustment screw is just above the mounting hole. These sell for $10 a piece at the hardware store. See photos to make sure that they are what you need. No returns. Thanks for looking.