office chair spare parts, 1)nylon core + PU edge, 2)dia ... hood type, 4)soft and no noise for floor Office chair spare parts,metal pin11*22mm metal pin with springColor White ... black, grey colors and other color are available Used place office chair, movable cabint, electric fan etcPrompt delivery 10 days a) ... , please kindly visit our website7)used for JWKU50 office chair spare parts with stable quality