Bonnel Spring is the oldest spring type technology and is currently widely used in the entry-level spring mattresses.
Bonnell springs are hourglass-shaped, and the ends of the wire are knotted or wrapped around the top and bottom circular portion of the coil and self-tied.
All the individual spring are then tied together using spring wire, and the completed structure is reinforced with a strong border wire to retain shape.
2.0 – 2.5mm
73 - 92 mm
100 -160 mm
1.3 - 1.4 mm
4 - 6
110 - 130