Register your guarantee With over 150 years of experience, you can feel confident in choosing your Parker Knoll sofa or chair. To support this, we provide you with a unique 25 year frame and frame assembly guarantee. This applies to all wood and wooden components of your Parker Knoll furniture. In addition our recliner furniture is supported by a 5 year guarantee for motors and mechanisms. To validate your 25 year guarantee and to help us understand you better, please fill in the questionnaire below.