Features: Pillow block bearing is a kind of bearing unit which combines rolling bearing and bearing block, which has good versatility and interchangeability. Self-alignment bearing can correct its own alignment once it begins to rotate. Made of bearing steel and cast iron shell, high hardness and sturdy. Two-bolt mounted pillow block bearing, designed for mounting onto bearing surfaces parallel to the shaft axis. Stable and dependable performance. Specification: Type: UCP204 Material: Bearing steel + Iron Weight: Approx.1050g/ 37oz Inside Dia.: 20mm/ 0.79in Outside Dia.:47mm/ 1.85in Package List: 2 * Pillow Block Bearing Note: Please allow slight error due to manual measurement. Thanks for your understanding. .