The LabStrong D8905LS hose nipple cartridge is comparable to the Thermo Scientific Barnstead D8905 cartridge. Side-by-side testing shows fantastic results for purity and longevity. The HN Dyed Cation Removal Replacement Deionization Cartridge is used with hose nipple, non-pressure applications. The cartridge includes a 3/8 inch hose barbed connection on each end. The cartridge life capacity is indicated by resin color change. The resin color will change from purple to light brown, which indicates that the cartridge is exhausted. The water purification cartridge provides outstanding quality you expect from your water system at a low cost. The cartridge is an economical alternative for all laboratories and is ideal for small volume applications. LabStrong takes extra care in sealing our water purification cartridges to ensure exceptional quality is maintained throughout the two year shelf life. This cartridge has fitted sealing plugs/caps placed on both ends and then it is further sealed in a bag ? the combination of which dramatically inhibits drying out of the resin.