From the description:

NOTE: Some players report that certain games which use magnets that rapidly move the ball back and forth over the magnet (Dialed In, some modern Stern games) can cause chrome pinballs including the Ninja ball to become magnetized over time, possibly leading to balls sticking together. This does not happen suddenly but over 100+ games. Many buyers have had no issues with the chrome balls in most magnetic games, but your mileage may vary.

Well, over six months and lots of play on mine and no magnatism. Knock on wood!

I have the ninja balls in MET, DI, and GoT. Great so far in all 3 games. I'd say around 100 games for MET, around 200 on GoT, and approx 500 on DI. I decided to keep carbon in my LOTR.

Ninja Balls...

LOL

I used the ninjas in my MET pro knowing they could magnetize and that's exactly what they did. After what I would say was less than 100 games the balls started to stick together so much they wouldn't roll forward in the trough enough to register the switches. Took the balls out and put them on a table. Took one ball and touch another with it and I was able to pull the second ball a crossed the table with the first. I still use the ninjas in my GoT Pro and really like them, but will not put the ninjas in a machine with magnets. This is just my experience.

You think the ninja would be ok in a game like BKSOR with limited magnet use or go with the carbon ?

I have Star Wars Prem, Ghostbusters Prem, and a Mando Prem coming. Anyone using Ninja pinballs in these games have problems with magnetism?

I'd go Titan personally.

Id avoid chrome balls in any magnet game

Had them for about 20 star trek Le games before they started sticking together at the magnet.

I don't run chrome balls in any games because eventually you don't remember which game has them and which don't.
Once they are mixed, you're done

Thanks!

>

Everyone is correct. The Ninja is a Chrome alloy and not really recommended for magnetic features BUT- The Polaris Carbon ball by Ballbaron is in stock and is highly accepted as the 'Go To' alternative. Always in stock now and sold on ball baron.com, eBay and Amazon.

Have you ever tried the Ninja?

Yup, fantastic shine & quality

It's the single worst pinball I have ever purchased, from multiple businesses over a decade+, and I advise everyone I can to avoid it.
I was interested in a new brand and was turned on to Titan, which I was impressed with.

I assume you are referring to the Polaris? What was so bad about these balls compared to others.

Yes Polaris. Dull as they come, duller than balls I took out of games 7 years ago. I don't know anymore technical/industry terms but they looked like hot garbage

They are pretty much described like this on the website though so I guess it's fair.

Hah. Thanks for the honest take.

Pinball Life's are horrible as well. I know they don't offer the "oh so shiny" ones anymore but figured the standard ones they carry would be half way decent. They were gray and so dull I threw them away. When I first unboxed them I was hoping it was just some kind of film that needed removed but it was not. Maybe they would be acceptable for games on location where the average player doesn't know any better.

Its pretty much universally known that all these ball bearings are made in China... and not to anyone's "better" specifications. I think its another one of those lowest common denominator things which aren't made in the USA.

The BallBaron may claim his are better in some way... he might be post processing some of them.
But; I just don't have faith in anyone's specific brand anymore.