Given the many different types and specifications of linear actuators, it would be impossible for us to have all units of all types on hand at once. If you are having difficulty finding your ideal actuator, please call or email us with your specifications and we will have a unit customized for you. Our custom order feature allows you to customize a linear actuator with a variety of customization options depending on the model. There is no minimum order quantity required and we offer discounts on custom order quantities of 10 or more. Please be aware that all custom orders will take from 10 to 20 business days to manufacture. All custom orders are non-refundable.