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spring unitsDetailed Product Description Our company produces bonnell springs and bonnell spring units for use in mattress manufacturing. Below are the specifications that we currently work with. Input Materials-Spring wire (mm): 1.0-2.4Helical wire (mm): 1.4Spring Coil Configuration-Number of Turns: 4, 5,6,7Height of Springs (mm): 100-160Diameter of Spring (mm): 80-93The Bonnell Spring units are offered with multiple coil counts for a given length. For example, a 190cm unit can be configured to include 22, 23, 24 or 26 coils along the length.Options-with or without border framecompressed packingPlease also visit us at our website and feel free to contact us through alibaba with any specifications not listed above that address your local market. We would appreciate the opportunity of working with you to fulfilling your requirements.