| Specify as EDI Model AP-asm-L.L.TTT where |
| a = active surface: M for mixed metal oxide or P for platinum |
| s = substrate: T for titanium or N for niobium |
| m = waterbox wall thickness 1, 2 or 3 inches |
| L = active length, inches |
| TTT = micro- inches platinum: 100, 150, 200, 250, 300, or electrolyte for mixed metal oxide: F, B, or S for Fresh, Brackish or Salt water. |