Prime Line Products N 7449 Door Roller Assembly, 7/8 in, Convex, Plastic Tires, Steel Bracket & Ball Bearings, Pack of 2

Used as a top roller assembly on pocket door and by-pass closet door systems 7/8 in. outside diameter wheels Convex edge wheels (round edge) and Comes in a pack of 2. Constructed 4 of plastic wheels with steel ball bearings, assembled to a steel bracket Note: If product sold by Amazon.com and looks like image on this page, then rollers DO have ball bearings., Weight: 0.3 pounds, Manufacturer: Prime-Line Products