Corrosion resistant cartridge models (stainless steel hex body, titanium or brass adjust screw) are designated by /AP appended to the standard model code. (Corrosion resistant models were previously depicted with a P for Buna-N and W for Viton in the 7th position of the model code.) New codes will be developed as new material/coating choices are made available.

Below is an example of the model code structure:

**Please note: Our corrosion resistant product line is growing. Please check the Option Selection area on each cartridge product page for available choices. Please consult us if the corrosion resistant option is not available for your desired cartridge.