ITEM NAME:2 pcs 624Z bearing steel ball bearings M2F6 2 pcs 624Z bearing steel ball bearings M2F6 Product Name: Ball Bearing Model: 624Z Type: miniature Material: bearing steel Color: silver tone Inner diameter: 4mm / 0.16 Outer diameter: 13mm / 0.51 Width 5mm Net weight: 6g Package Included: 2 x ball bearings Only the above package content, other products are not included. 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..Model: 624Z. Material: bearing steel. Net weight: 6g.