Due to the corona crisis there is unprecedented demand for Berkey systems and some Berkey models are currently out of stock. If you would like to be alerted upon the arrival of new stock please send us an email specifying the Berkey model you wish and we will notify you when it is back in stock. In the meantime the Black Berkey filters and PF-2 filters are available. Thank you for your understanding and we look forward to serving you in the near future.