Review on WEN 55201 Magnetic Generators Compatible by Jared Peck

I bought this for an Aipower SUA2300i inverter generator. It fits well. Before I put this dipstick in, my alternator ran about 30 minutes since it was new. I put this dipstick in and let it run for about 15 minutes. When I pulled it out there was black goo at the bottom of the dipstick. I pulled it out and wiped it on a napkin. If you look at the picture, all the black on the napkin is what's sticking to the magnet. It does what it says on the tin, and for less than $10, it's good insurance for an expensive generator. I also have a Generac GP3300 generator. This probe also fits Generac.