Martyr CMR Rudder/Trim Tab Anodes

Almost the same OD size. Smaller, odd size fastner.

So far so good. These were direct replacements of the zincs I had in place. Been on for awhile now. I would definitely recommend them to friends.

very high quality

This item it two pieces sandwiched together. I separated them to use 1/2 on each trim tab. It only comes with hardware for one. I just used my existing bolt for the other half.

I use this as a sacrificial anode in a saltwater pool. It appears to be working great after several months. It has corrosion on it but none of the pool hardware shows any.

Excellent product. These come as two flattened domes of zinc with a stainless steel bolt passing through the center of one to thread into a captive stainless nut in the second. By design, they sandwich around the item to be protected from corrosion, usually a boat keel. The zinc corrodes away as a sacrificial anode, which protects other metals while the zinc lasts. I got these for corrosion protection, but not for a boat. I installed them on a gas grill to find out if they will stop the latest set of replacement burners from corroding away so quickly.

I ordered these for use in a pool. They accomplish the task just fine. Thank You.

Arrived as expected

Fine

Only came with half of it.