Product Description Slide-Co 131476 Sliding Glass Door Roller Assembly 1-1/4” steel ball bearing roller. Adjustable steel housing. Housing dimensions: thickness 3/4", length 2-5/8" height 1-3/8". From the Manufacturer Slide-Co 131476 Sliding Glass Door Roller Assembly 1-1/4” steel ball bearing roller. Adjustable steel housing. Housing dimensions: thickness 3/4", length 2-5/8" height 1-3/8".