Stelth Model SRE-002-CFY
Copper-Copper Sulfate (Cu-CuSO₄)
for water and saturated soil service in chloride free conditions

Stelth Model SRE-004-SFB
Silver-Silver Chloride (Ag-AgCl)
for water and saturated soil service in chloride conditions

Stelth Model SRE-006-ZFR
Zinc-Zinc Sulfate (Zn-ZnSO₄)
for water and saturated soil service in chloride free conditions