These are an old style candle used in old style under sink units.

Ceramic Length : 20cm long (8 inches long)  X 5cm wide

These are very long candles only suitable for old style pressure pozzani under sink filtering.

Australis Ceramic Water Filter Candle filter down to 1 micron porosity, which allows it to filter out giardia and cryptosporidium. They also remove chlorine, chemicals, metals, sediment, bad taste and odours.

However the filters do leave essential minerals including Calcium, Potassium and Magnesium to keep you healthy.