Unger Ultra Resin Filter Pack For Hydropower S. Contains a pre-portioned amount of premium ion-exchange resin perfected for glass cleaning. Including Unger’s FloWater technology 2.0 in every Ultra resin pack, ensures an efficient flow of water through the whole tank which optimises the resin saturation. Lightning-fast and simple resin change. FloWater technology 2.0, guarantees you 50%-60% more usage out of your resin compared to old loose resin systems. New formulated resin specific to window cleaning. Code: UNDIUB1