SKF NKI 12/16 Needle Roller Bearing, Radial Removable Inner Ring, Open, Steel Cage, Metric, 12 mm Bore, 24mm OD, 16mm Width Radial needle roller bearing for applications with high dynamic and static loads Inner ring provides a hardened and ground raceway for applications where the shaft cannot be used Steel cage guides and evenly spaces rollers for reduced friction, vibration, and noise Through-hardened, high-carbon chromium steel rollers for heat tolerance and durability under heavy loads Meets standard ISO 492 for quality assurance