Extremely durable 6" x 18" (6.5 litre volume) structural pressure vessel complete with deionisation resin to 'polish off' and purify your water 100%. All our resin vessels come complete with 'hoselock' type inlet and outlet fittings to join into 1/2" garden type hose. (see image). Please note that we also sell the vessels empty - see the Empty DI Filters page for empty resin vessels.