GD52110 Stem Size: 0.44" W x 4" D Steel ball bearing rollers with steel inner race, factory lubricated, a selection to replace most garage door rollers. You may wish to stock these related parts: GD-12140, GD-12203. Features: -Track roller. -Diameter: 1.88". Specifications: -Stem size 0.44" W x 4" D: 11.5"H x 3.81" W x 2" D. -Stem size 0.31" W x 4.25" D: 11.5"H x 3.81" W x 2" D. -Dimensions: 11.5" H x 3.81" W x 2" D. gd52110 Installation