FF33 Microphone Capsule Replacement

Marsoni

M251S

$14.00

Get it in 3 business days with 1 day shipping. Friday, May 29

FF33 Microphone Capsule ReplacementTested, working spare microphone capsules for the FF33 field phone as well as almost any German phone from WWII and a little beyond that. Most of these are post war, East German, but at least the fit and function. Price is for one. I tested all of these, any that did not work I threw away and the ones that worked really really well, I put aside for myself. You will not be buying a dud, all that are left work well.

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Exchange/Return Notes

We offer a 30-day return/exchange service after receiving.
Final sale items are not eligible for returns or exchanges.
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I tried these on my teenage son who has pretty yellow teeth after braces. You can’t really tell in pics but in person they made a difference. He hasn’t had any odd side effects or sore gums from using them and said they were easy to use. He wears them for the recommended amount of time although started lower the first time to make sure he wasn’t allergic or anything. But so far great product and we are happy with it!

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Reviewed in the United States on February 1, 2026

Sammy Squirrel

Natrona Heights, US

★★★★★ 4

Work about as well as drugstore brands.

These are at least as good as the national brands at a fraction of the cost. They stick on easily and used as directed will whiten your teeth a few shades over the course of treatment.

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Reviewed in the United States on December 5, 2025

Verified Purchase

Sharon T.

Pawtucket, US

★★★★★ 2

Combersom

Cumbersome, does not hold 3nough water

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Reviewed in the United States on May 25, 2026

Miah Quesada

Belleville, US

★★★★★ 3

Mixed Results

These strips fit comfortably and don’t slide around, which I appreciated. They are gentle on my gums and enamel, and I noticed a slight improvement in brightness after consistent use. That said, they aren’t as strong as some other whitening strips on the market, so if you’re looking for dramatic results you may be underwhelmed. Good for subtle whitening.

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Reviewed in the United States on October 2, 2025

Disappointed Reader

Phoenix, US

★★★★★ 5

Does work well for removing minor stains

This product is probably best for removing minor staining - things like coffee, tea, red wine. I don't think it would work for longer-term stains that accumulate with age - the strips are not powerful enough for that. Very easy to use: just apply and leave on for half an hour or until you can feel that they are no longer well-attached. The "cleaning" process starts immediately - you can see the bubbles form. I am a tea drinker, and I notice immediate effect after putting these on. Don't expect miracles, but they will help with fresh stains for sure. For me, they do not increase the sensitivity, but my teeth are generally not sensitive. But they are peroxide based, so the possibility is always there that it could have that side effect.

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Reviewed in the United States on November 1, 2025