[Sammus]

Another note, I bought 3 pinions in that first order (14,16,18) and 3 in an order a couple weeks later (17,18,19) and none of them have a black oxide coating like in the above pics. They all look like bare hardened steel - with that bronzish colour tinge to it. They have all started to rust like the photo I posted earlier since I bought them.

Not really complaining, just stating my experience. I cleaned them and oiled them and they look a lot better now.