Use together with external stopper. Secure enough installation strength. (standard of 2 or 3 times of maximum effective point) More than two parallel use are also possible. Avoid applying offset load. ●A1C / A1R…Allowable deflection angle : less than 2.5° ●A1D ………Allowable deflection angle : less than 6° Do not pull the piston rod and rod's cap. Air will get inside and will be the cause of defect. Not suitable in place using oil or in vacuo.