Provides linear guidance along the rail through a four-row, full complement ball arrangement, carried on the long carriage version of the KWVE45 series. The full complement ball set increases the number of load-bearing balls in contact, which supports higher rigidity of the carriage relative to the rail. Net mass of the carriage is 4.473 kg, and it is manufactured to accuracy class G3. The long carriage design (L) extends the contact length on the rail, distributing load over a larger bearing surface and improving guidance stability under moment loads. Accuracy class G3 sets the permissible tolerances for parallelism and dimensional consistency, which should be matched with a rail of compatible accuracy grade when installing the system. No other manufacturer's cross-reference is provided for this symbol.