Description: Internal Diameter (Shaft Diameter): 8mm Total Length: 24mm Flange Dimensions: approx. 3.2 x3.2 x 2.3cm/ 1.26 x 1.26 x 0.91inch Material: metal elements Model: LM8UU Package Includes: 1 Piece Round Flange Bearing Note: Please allow 1-3mm error due to manual measurement. Please make sure you do not mind before you bid. Photo color might be a little different from the actual product due to color display of different monitors. Thanks for your understanding and enjoy your shopping moment