TUV Black Gas Lift/Gas Cylinder/Gas Spring with Different Taper for Office Chair. Customizable Pressure: Pressure range 350N-480N available for specific needs. Customizable Dimensions: Tube thickness 1.0mm-2.5mm and package size 36*33*15cm customizable. Fast Response Time: Inquiries replied within 24 hours. OEM & ODM Service: Full OEM and ODM services available based on drawings or samples. Short Delivery Time: Delivery time controlled within 15 days. Free Small Orders: Orders of 1-5 pieces are free. TUV Certification: Products certified by TUV, LGA, and SGS. Iron Material: Constructed from durable iron material for home and office use.