... tilting ,up and down your seat,make your chair perfect Usageoffice chairs,swivel chairsMOQ1000pcsLoading capacityabove 200kgCertificationpass the salt ... testWeight1.72KG/pcs *Specifications:1. pretty convenient for chair adjustment 2. professional manufacting table furniture hardware 3. ... domestic market,including barstool swivel plates, lift up mechanism for coffee tables, all kinds of sofa parts ...