CM55989KITA - Aluminium Anode - for use in salt and brackish water.
Fits Mercruiser Alpha One Generation One Sterndrives, attaches to the Alpha One gimbal housing's mounting bolts.
This kit contains:
• 2 button anodes...

CM55989KITM - Magnesium Anode - for fresh water only. Not recommended for salt or brackish water. 
Fits Mercruiser Alpha One Generation One Sterndrives, attaches to the Alpha One gimbal housing's mounting bolts.
This kit contains:...

Part may not show prefix on packaging (97) but still is correct part

Aluminum
Fits MC-I, R, MR, Alpha and Bravo drives (s/n 0D469828 and below)
Priced individually, sold @ multiples of 2
Mercury Branded, Clamshell Package Point of Sale Packaged.

Aluminum
Fits MC-I, R, MR, Alpha and Bravo drives (s/n 0D469828 and below)
Priced individually, sold @ multiples of 2
Quicksilver Branded, Clamshell Package Point of Sale Packaged.

• Anode (Priced Per Pkg of 2)
Key Features:
• Standard package of 2
Additional Details:
• For: Bravo I, II, III (1988-1995)
• Material: Zinc
Interchange:
Mercruiser Stern Drive
• 55989...

• Anode (Priced Per Pkg of 2) (Display Pack)
Key Features:
• Standard package of 2
Additional Details:
• For: Bravo I, II, III (1988-1995)
• Material: Zinc
Interchange:
Mercruiser Stern Drive...

• Anode (Priced Per Pkg of 10)
Key Features:
• Standard package of 2
Additional Details:
• For: Bravo I, II, III (1988-1995)
• Material: Zinc
Interchange:
Mercruiser Stern Drive
• 55989...

• Anode (Priced Per Pkg of 2)
Key Features:
• Standard package of 2
Additional Details:
• For: Bravo I, II, III (1988-1995)
• Material: Zinc
Interchange:
Mercruiser Stern Drive
• 55989...