Pocket spring, for mattress uses, compressed packing. IT could divide into different zones,3 zones,5zones, Pocket Spring Units are spelially design for bedding with high stensile wire.pocket cushion springs 1).Different sizes are availble, up to customers requirements2).Use for mattress3).Diameter: 1.7-2.0mm4).Various sizes are available5).Assure quality6).More durable and flexsible.