Mattress spring unit Twin, Full, Queen, King, 288,312,336, 364, 3.0, 3.6, 4.0, 4.6. Steel wire range: 2.0mm to 2.4mm good quality, competitive price, swift reply We are metal products manufacturer and exporter in China, we offer spring tines, rubber track, rubber belt and other agri parts for harrow , tedder, rake, baler, harvester, cultivator and other farming equipment. Also,we offer zig zag ...