Mr Alun Davies wrote:
"boyoboyo" wrote in message
...
Where can I buy different mesh sized sieves for seeds extraction ??

Could start here
http://www.gardengrapevine.com/SeedSeperator.html

Fine if you're in the US, and want to spend over twenty bucks for just
one. Otherwise, as Alan says, a kitchen strainer. John Lewis, among
others, will have a selection of mesh sizes.

--
Mike.