... 18Φ422S+80550400-5200CustomizeWelcome your design3. Usage:Bed, wheel chair,sliding door, tool box, machinery, automobile,hospital equipment, Children ... chair, office chair, furniture, cabinet, etc.4. Features:1) Nitrogen filled inside2) ... Any questions? Pls contact us without hesitation. supporting gas spring ( ISO9001:2008,SGS,ROSH)