nitrogen gas spring: 1) Controllable adjuster for feet and back of massage chairs 2) Suitable for adjustment chairs high quality nitrogen locking gas spring1. Specfication: Length=your request Stroke=450-550mm Tube diameter=22/26/28mmRod diameter=10/14/16/20mm Force=200-1800N (Welcome your drawing)2. Structure chartType A – elastic blocking Type B – rigid fixing at a pulling, elastic at cave- ...
