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Don't know the difference between the different seat springs? Find out the important differences to help you for your next upholstery project.
Step-by-step guide on how to measure and install tension springs for your next armchair upholstery project.
Tension springs are measured from 'inside the hook' to 'inside the hook'. Tension springs are usually 10% shorter than the width of the frame, however this depends on how firm you want the spring.