Standard Bonnell Spring Units are most widely used spring interior for mattresses in the world.
RED Springs manufacures a wide variety of options. All Standard Bonnell Spring Units are heat-treated under controlled conditions for better resistance and durability. This ensures that each component part of the unit-helicals as well as springs are stress-relived and strengthened, thereby eliminating sag or set of springs.
Units can be supplied unframed fitted with a frame options, hardened and tempered flat steel strip.
Standard Bonnell Spring Units are also available in variety of specification use as box springs.