The Bonnell is the common core in making matress beds and sofa furniture. The firmness of the unit is varied by using different steel wire sizes and numbers of spring. The firmer the bed, the more springs. We use 2 times of heatreatment to the springs. One time is to heattreat the individual coils prior to assembly of the complete unit wire by helical, the second is to heattreat the whole unit to prevent sagging under load. Reliace Bedding offers many different Bonnell springs with different wire gages in different wire gates in different turns, such as 4-turns, 5 turns, 6 turns.


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