ITEM NAME:10 pcs MR74-ZZ (4 x 7 x 2.5 mm) Ball Bearing L5H3 10 pcs MR74-ZZ (4 x 7 x 2.5 mm) Ball Bearing L5H3 Color:Silver Bearing Material:Bearing Steel Ball Material:Bearing Steel Inside Diameter: 4, mm Outside Diamater: 7, mm Width: 2.5 mm Package included: 10 X Ball Bearing Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..Bearing Material:Bearing Steel. Ball Material:Bearing Steel.