These brand new filters from Pond Kraft have all the features that you need. The pollution indicator tells you when cleaning is needed & the Easy Cleaning feature makes it A breeze. Just turn the handle to 'clean' & the foams are back flushed by the water removing most of the dirt. Turn back to 'run' & you're done. When you add a pump you'll get the powerful & reliable Pond Kraft filter pump. Hose size 20-25mm on 4000 20-40mm on other models 2 year guarantee Why not buy a kit & save money? Add a pump. For the Pond Kraft Pressurised Filters performance table To read more about the Pond Kraft Pressurised Filter please worth £24.99 & a Free worth £14.99 as well as free hose & clips! Simply choose the kit you require from the drop down menu.