CSCB030 Thin Section Ball Bearing 3" x 3-5/8" x 5/16"CSCB030 Thin Section Ball Bearing 3" x 3 5 8" x 5 16" Open Style ABEC 1 The CSCB030 is a slim profile radial ball bearing designed for applications where space and weight are tight, but performance still matters. With a 3 inch inner diameter and open construction, its a solid pick for aerospace, robotics, or automation where every millimeter counts. Size: 3" ID x 3 5 8" OD x 5 16" Wide Type: Deep groove thin section bearing Material: Chrome steel