Only the genuine OEM CircuPool RJ Classic replacement cell is up to 2x longer lasting than other off-brand generic cells, compare 15,000 hour lifespan versus 8,000 hours. The CircuPool RJ-45 Classic replacement cell is compatible with original RJ-45 Classic Control Modules. For use with pools up to 45,000 gallons. (Easily replaces cell in existing plumbing without tools, electrode only, excludes clear housing or cosmetic shell)
You may also wish to replace the o-rings at the same time you replace your cell, link: RJ-Classic O-ring Set