All parts fit.
Includes the models: 12501, 12502 and 12503
Can be used individually or stacked for different lifting heights
They will not slide or will move during lifting
Capacity: 55T
Height: 3 '' (76mm), 6 '' (152mm) & 9 '' (229mm)
Can be used individually or stacked together for different lifting heights
Weight: 141 lb. (64 kg)