Prime-Line B 695 Roller Assembly, 1 in. Outside Diameter, Concave Edge, Steel Ball Bearing, Columbia Doors This roller assembly is used to replace damaged or missing rollers on sliding screen doors 1-3/8 in. x 1-1/4 in. x 5/16 in. housing w/1-15/16 in. hole centers and a 1 in. outside diameter concaved edge wheel Spring-loaded roller assembly Constructed of an inner and outer plastic housing with steel spring and wheel