NAL LD3Model Linear Actuators are built from a Tubular Aluminum alloy, light weight body, integrated with high speed planetary gear motor. The Speed is 9" per second (230mm/sec) at no load with a force of 22lbs. (Higher loads slower speed options are available for custom orders). The actuators are suitable for any type of indoor/outdoor application where high speed stroke is required and/or very low noise, measuring only 5dB above ambient. These Actuators look great, there fast, versatile and quiet.