D1500 Diameter: 1" Features: -Sliding glass door roller. -Material: Steel ball bearing. -Center grooved, universal design. -Steel ball bearing with steel inner race and 0.25" hole. -Installation bolts included. -Diameter 1": 5.44"H x 0.63" W x 3.81" D. -Housing width: 0.6". Specifications: -Housing width: 0.88" at dimples. -Housing length: 2.13". -Dimensions: 5.44" H x 0.88-3.81" W x 0.88-3.81" D. -Axle diameter: 0.25". -Edge type: Concave. d1500 Installation d1501 Installation d1502 Installation