Bonnell Spring Units are the most widely used spring interior for mattresses and sitting groups in the world.  Complete with the latest technology production machinery and equipment, as well as qualified technical support, Boyçelik is able to offer a wide range of products to its customers.

Bonnell spring frames made at 85-180 mm range are put through heat treatment processes to prevent sagging. Manufacturing  wire with width ranging from 1,90 mm to 2,50 mm and spring with 4-5-6 spin springs to various height specifications is possible.

Boyçelik made bonnell frames are;

• Classic and best known spring system.
• Comfortable, durable and economic.
• Manufactured in varying wire and spring diameters.
• Provide long term use and comfort advantage thanks to spring fatigue and annealing processes during production.