CSCD045 Slim Thin Bearing 4-1/2" x 5-1/2" x 1/2"CSCD045 Thin Section Open Bearing 4 1 2" x 5 1 2" x 1 2" Inch ABEC 1 Steel The CSCD045 is a slim, open style ball bearing designed for space restricted applications. With its 1 2" cross section and ABEC 1 quality, it's a go to choice for robotics, rotary tables, or aerospace setups needing low weight and high precision in a compact form. Pack size: 1 bearing Inner diameter: 4 1 2" (4. 5") Outer diameter: 5 1 2" (5. 5") Width: 1 2" (0. 5") Material: