CM873395A - Aluminium Anode - for use in salt and brackish water.
For Volvo Penta DPX-S, DPX-S1, DPX-R, DPX-A, DP-SM, and SX-M drives.
Dimensions:
Length: 53.34mm (2.100in)
Width: 40.64mm (1.600in)
Depth: 35.56mm (1.400in)...

CM873395Z - Zinc Anode - for salt water use. Not recommended for fresh water.
For Volvo Penta DPX-S, DPX-S1, DPX-R, DPX-A, DP-SM, and SX-M drives.
Dimensions:
Length: 53.34mm (2.100in)
Width: 40.64mm (1.600in)
Depth: 35.56mm...