... pocket spring units for use in mattress manufacturing. The Pocket Springs are barrel shaped and can be encased in needle punched ... .1Spun-bond polypropylene (gsm): 70, 80 Spring Coil Configuration-Number of Turns: 6.5Height of Springs (mm): 100-230Spring Diameter (mm): 40 ... frames (mm): 3.6, 3.8, 4, 4.8Reenforcement springs, including corner springs (mm): 3, 3.6, 3.8Roll PackingFlat Packing Please ...