General description These 40PCS MR105-2RS 5X10X4mm Ball Bearings are deep groove ball bearings that are widely used, economical, and standard. They are designed for less friction, allowing for higher speeds and increased durability. The special non-contact double rubber seals effectively keep out dirt while providing friction-free performance, making them ideal for various applications. Technical specifications Size: 5 x 10 x 4 mm Material: Steel Color: Black Package Contents: 40 x Bearings Other information Note: Light reflection and different displays may cause the color of the item to differ slightly from the actual product. The measurement allowed error is +/- 1-3 cm.