695ZZ/O12 Shielded Miniature Bearing 5x12x4mm695ZZ O12 Ball Bearings 5mm x 12mm x 4mm 695ZZ O12 Ball Bearings, a standard bearing size with dimensions commonly used across many industries: 5mm x 12mm x 4mm. made from durable 52100 alloy steel, commonly known as chrome steel, each Comes with double metal shields (ZZ) to keep out dust and dirt. Double Shielded Ball Bearings Size: 5mm x 12mm x 4mm Dimensions: 5*13*4 mm Metric ID (inner diameter) Bore=5mm OD (outer diameter)=12mm Width Height