... ,spring unitsmattress spring, sofa pocket spring Bonnell Springs Our company produces bonnell springs and bonnell spring units for use in mattress manufacturing ... .4 Spring Coil Configuration-Number of Turns: 4, 5 and 6Height of Springs (mm): 100-160Diameter of Spring (mm): 80-93 ... (mm): 3.6, 3.8, 4, 4.8Reenforcement springs, including corner springs (mm): 3, 3.6, 3.8Roll PackingFlat Packing Please ...