The LabStrong D50280LS cartridge pack is comparable to the Thermo Scientific™ Barnstead™ D50280 cartridge pack. The LabStrong water purification cartridge pack is compatible with Thermo Scientific™ Barnstead™ NANOpure™ DIamond™ Style water purification systems. This water purification cartridge pack provides outstanding quality you expect from your water system at a low cost without leaks. The cartridge is an economical alternative for all laboratories and easy to install. Plus, all packs include one 0.2μm final filter! Product Type: Water Purification Cartridge Pack. Thermo Scientific(tm), Barnstead(tm), Nanopure(tm) and Diamond(tm) are trademarks of Thermo Fisher Scientific Inc.