• 100% Genuine,Made In England
• Doulton Biotech Sterasyl  is silver impregnated ceramic microfilter. The incorporation of silver locked within the ceramic structure inhibits the growth of bacteria giving the candles self-sterilising properties and removes the need for regular boiling. 
• Quality Control : All Genuine Doulton ceramic filter candles are manufactured in accordance with ISO 9001:2008 quality assurance procedures which ensures highly consistent product quality with full batch traceability in operation.