Corrosion Anode Assembly, Anode Barrel 2-1/2"L X 1-7/16" Dia., Replace This Unit At Regular Intervals., Just Befor It Is Consumed. Blowdown Boiler Daily., If Scaling Or Pitting Has Begun, Install Additional Anodes, And/Or Blowdown More Often., Cleveland 36Bcem48, 36Cdm16, 36Cem1648, 36Cgm16300, 36Csm16