Zinc shaft anodes with stainless steel screws and lock washers.
Collar series shaft anodes come with stainless steel socket cap screws, included. These anodes are direct replacements for Inboard engines and meet or exceed specified requirements of specification MIL-A-18001, the accepted authority used by governments of both Canada and the U.S. Zinc content is 99.995%.

Part # Shaft Size Length O.D, Weight Lbs. C – 1 3/4″ 1″ 2 – 1/8″ 0.65 C – 2 7/8″ 1″ 2 – 1/8″ 0.65 C – 3 1″ 1 – 1/4″ 2 – 1/2″ 1.20 C – 4 1 – 1/8″ 1 – 1/4″ 2 – 1/2″ 1.10 C – 5 1 – 1/4″ 1 – 1/4″ 2 – 1/2″ 1.00 C – 6 1 – 3/8″ 1 – 1/4″ 3″ 1.55 C – 7 1 – 1/2″ 1 – 1/4″ 3″ 1.50 C – 8 1 – 3/4″ 1 – 3/8″ 3 – 1/2″ 2.25 C – 9 2″ 1 – 3/8″ 3 – 1/2″ 2.10 C – 9A 2 – 1/4″ 1 -3/8″ 3 – 1/2″ 1.75