![](https://static.dezeen.com/uploads/2009/03/rock-7-by-hironori-tsukue-rock7-3.jpg)
Rock 7 by Hironori Tsukue
Japanese designer Hironori Tsukue has created a set of rockers for the Seven Chair, designed by Arne Jacobsen in 1955 and produced by Fritz Hansen.
![rock-7-by-hironori-tsukue-rock7-2.jpg](http://static.dezeen.com/uploads/2009/03/rock-7-by-hironori-tsukue-rock7-2.jpg)
Manufactured in white, lacquered birch or natural, lacquered ash, the rockers slot onto the chair's legs without any fixings.
![rock-7-by-hironori-tsukue-rock7-1.jpg](http://static.dezeen.com/uploads/2009/03/rock-7-by-hironori-tsukue-rock7-1.jpg)
More information on the project website.
The following text is from Hironori Tsukue:
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For several years, I have been an owner and user of the "seven chair” by Arne Jacobsen / Fritz Hansen. I use this chair every day as my working chair. I prefer this one to any ordinary high-tech office chairs. I also believe it looks much better in my home environment.
Unfortunately the sitting height is a little bit too low for an office chair. Therefore, I would like to present my solution to this problem. My idea is to add metal pipe legs to the original chair. Apart from obtaining a perfect height, different ways of sitting will be possible - to sit in different angles helps to reduce monotonous pressure on your body.
I believe this new working/rocking chair would be a nice alternative office chair, possible to use in offices as well as private homes, cafés, restaurants, public libraries etc.
The rocking parts are packaged in a small box, easy to buy and attach to the original ”seven chair” without any tools.
About 7 chair
Designed by danish architect Arne Jacobsen 1955 and sold over 5 million copies and still selling. Produced by Fritz Hansen.