The stroke of linear actuator can be customized. However, there are limitations due to the raw material stiffness of piston rod and specific force applied to the actuator, thus you might be disappointed by the supplier that they can not offer your expected stroke with enough load capacity. Fortunately, Our DJ805 is really a tough guy that can be 1000mm stroke with load up to 600KG. https://www.hbactuator.com/long-...ial-linear-actuator.html