Unger Ultra Resin Pack for HydroPower Ultra Filter S Ultra Resin Pack for DIUH1, DIUK1, DIUKU • For Hydro Power Ultra Filter S• Every Ultra resin pack contains a pre-portioned amount of UNGER premium ion-exchange resin• New formula, perfected for glass cleaning• The FloWater technology... RRP: Was: Now: £55.18 - £156.10 Choose Options