This carriage is the long runner block of a six-row linear recirculating ball bearing and guideway assembly, guiding a rail through six rows of recirculating balls. Compared to standard-length carriages, the extended body increases the contact length along the rail, spreading the load over a larger running surface. Net mass is 1.58 kg, and the carriage is produced to accuracy class G3. The G3 accuracy class sets the tolerances for running parallelism and dimensional consistency of the assembly, which is relevant where the guideway must maintain steady alignment along its travel. The longer carriage body, combined with the six-row ball arrangement, gives a broader load-bearing base and more even load distribution across the carriage length than shorter versions of the same guideway system.