This is a spring-loaded 7/8 in. diameter nylon roller guide in a steel nail down base. The base is 3/8 in. with 2 nail down tabs on either side. It mounts on the top edge of a bi-fold door that is 1 in. to 1-3/8 in. thick and up to 30 lbs.

• Brand Name: Prime-Line
• Finish: Mill
• Color: White
• Material: Steel
• Product Type: Guide Wheel
• Number in Package: 2 pc
• Packaging Type: Carded
• Diameter: 78 in.
• Screws Included: Yes
• Height: 1.75 in.
• Capacity: 30 lb
• Maximum Door Thickness: 1.38 in.
• Commercial or Residential: Residential
• Length: 1.75 in.
• Mounting: Top
• Application: 1 in. wide Bi-Fold Door Tracks up to 30 lbs.
• Hardware Included: Yes
• Width: 0.94 in.
• 3/8 in. diameter steel base
• Fits 1" wide bi-fold door tracks up to 30 lbs.
• Spring loaded
• 7/8 in. dia. nylon wheel
• Includes 1 guide wheel, two 1-1/4 in. nails
• Self adjusting