HCG cartridges are your high efficiency pleated filters that are made up of special resin impregnated cellulose and micro glass fibres. This combination of the two materials ensures consistent high flow rates and efficient filtration every time. These pleated filters are best used in water, chemical and petroleum based fluid applications.
With such a high glass content present, this assists in protecting the filter against swelling and deterioration which can be a problem when using cellulose based filters. Both the centre core and end caps are made of tin plated steel and Buna-N gaskets are standard.