Replace or repair broken or missing sliding door rollers with the Prime-Line D 1876 Sliding Door Wheels Assembly. This adjustable tandem patio door rollers replacement is used by a variety of patio door manufacturers. Made of stamped steel housing with concave steel ball bearing rollers in a yellow zinc finish, these patio door replacement wheels are strong, durable, and built to last. The housing of the sliding door rollers replacement is. A Phillips head screwdriver is required for installation and height adjustment of this roller assembly sliding door. The housing measures 11/16 inch wide, 1-3/16 inch tall, and 4-5/8 inch long. The wheel is 5/16 inch thick by 1-1/2 inches tall. The assembly comes with a minimum collapsed height of 1-1/2 inch. Please refer to the line art drawing for dimensions and compare with your needs before purchasing.