New Chair Replacement Rock box base Swivel Rocker Box Unit Swivel Rocking Box Mechanism Rotation Rocking Mechanism Material: Iron Model: UM-SW5018# Name: 22″/24″ Rock Swivel Chair Base Surface Treatment: Powder Coated Color: Black  Type:  chair base Usage: sofa / chair  Our services: OEM/ODM Terms of trade: EXW;FOB;CIF Terms of Payment: TT/Western Union/LC