Manufacturer of motion control products, Optimal Engineering Systems (OES), offers two series of low cost, low profile, motorised ball bearing linear guide (profile rail) positioning stages. The AQ140 series and the AQ150 series of linear stages are available off-the-shelf in travel lengths of: 50mm (1.969"), 100mm (3.937"), 150mm (5.905"), 200mm (7.874"), 300mm (11.811"), 400mm (15.748"), 500mm (19.685").