Features a 1 Inch Diameter ball bearing wheels for smooth and long lasting quiet operation.Used on 1-3 or 8 inch thick doors, Max Door Weight up to 220lbs (100kg). Fits Part 1125 and Replaces 1500 Hardware Kit. Compatible with 100, 134F, 138F, 2610F Series Track. This sliding door roller assembly is constructed of a steel bracket and a plastic carriage. The bracket's base measures 1 inch x 3 inch, and it features 3 plastic rollers that are spaced apart 1-9 or 16 inch on center. The wheels are constructed of durable plastic which provide for a smooth, long-lasting, quiet operation, and they feature 1 inch diameter flat edges. These roller assemblies mount on the tops of by-pass sliding doors, bi-fold doors and pocket doors. They are adjustable once installed, and they are used by a of pocket door manufacturers. Colour:As Shown Material:Metal Package Contents: 2 x top hangers 2 x door guides 1 x door stop 1 x wrench 1 x screws sets Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.