Compatible with Elkay 51300C replacement filter - Our premium filter cartridge is designed for a perfect fit with Elkay water fountain and bottle fillers NSF-42 and NSF-372 Cerified by IAPMO for its excellent filtration performance This filter utilizes an advanced activated carbon block with a super filtration capability to ensure effective reduction of impurities Produced with BPA-free and Lead-free materials Lasts up to 12 months or 3000 gallons, whichever comes first. Enjoy the long term peace of mind NO Chip - this filter dosen't include an RFID chip. If your Elkay water fountain model requires a chip version, please refer to the user manual for instructions on how to reset the indicator light. Alernatively, one can peel the chip from the old filter and stick onto the new filter Perfect replacement for the 51300C water filter