Swiss-made to the highest standards the Pocket filter has a combination aluminium/polypropylene/ceramic construction and comes packed together with accessories in a tough travelling case. It has a microporous deep-bed Katadyn ceramic filter with an average pore size of just 0.2 microns will remove all known bacteria leaving water clear and clean. An integral silver ion treatment kills the trapped bacteria allowing the filter to treat up to 50,000 litres of water before needing replacing. Suitable for use the world-over. Size: 6x25cm. Weight: 650gms Capacity: approx.1 litre/minute.