"Standard" MG90S servo, exact brand may vary from pictured there are a multitude of brands, if you care better ask first.
All the gears are metal in these MG90S (at least the ones I checked at random from each batch :-)).
Dimensions including the mounting arms are about 33mm long, 33mm high and 13mm wide.
Comes with typical pack of 3 arms.
Timing (pulse width) on the MG90S is about 400uS to about 2400uS from one extent to the other, not quite 180 degrees in practice.
I test all my servos briefly before shipping for basic functionality (one extent to the other), if you have bought servos from China you will probably have experienced dead-on-arrival ones before, hopefully my testing avoids that problem for you.
IMPORTANT NOTICE - using random cheap Chinese servos like these (or indeed any components) in devices that could be lost or destroyed if it fails is always a risk, one which you must be aware of and decide if it is acceptable. If you have a faulty servo I’m happy to sort that out, if you have a smoking drone shaped crater, well… not much I can do there.
All of our products are shipped from Christchurch, New Zealand using CourierPost for NZ, and Airmail for international.