The compact rail system has 4 sizes to suit the load ratings required (light to heavy duty). These rail systems are channel-type linear rails in which carriages with roller bearings run along the inside. As the carriages run inside the rails, rather than on top of the rails like the linear guide systems, it makes them very compact. The compact rail is a precision machined rail with hardened raceways offering higher load capacities and accuracy than the X-rail. Any length can be supplied and these linear rails offer unique alignment features to help with installation.