This carriage is a four-row recirculating ball bearing unit designed to run on a linear guideway rail, transmitting load through four rows of balls arranged for combined radial and moment load capacity. The narrow carriage design (B-S) provides a compact mounting width while retaining the four-row ball arrangement. Net mass is 0.356 kg, and the unit is manufactured to accuracy class G3. The four-row ball arrangement allows the carriage to accommodate loads and moments acting in multiple directions from a single unit, which is a direct result of the recirculating ball design. Accuracy class G3 defines the running and dimensional tolerances of the carriage, making it suitable for applications requiring a defined level of positioning precision along the guideway. The narrow body width should be taken into account when planning mounting space and rail selection.