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