This listing is for a basic MacOS installer which is meant to be used to install or upgrade compatible Apple systems. In the company's promo copy, Apple officially notes that the following general Macs support OS X 10.8 Mountain Lion:

iMac (Mid-2007 or newer)
MacBook (Late 2008 Aluminum, or Early 2009 or newer)
MacBook Air (Late 2008 or newer)
MacBook Pro (Mid/Late 2007 or newer)
Mac mini (Early 2009 or newer)
Mac Pro (Early 2008 or newer)
Xserve (Early 2009)
In addition, this flash drive can also be used to as the basis for installing MacOS on non-traditional Apple hardware as a Hackintosh system. If you intend to install on non-apple systems, you are required to do your own research to determine if the installation is even possible on the intended target and how to go about it.

What we provide:
* DVD or USB flash drive with MacOS installed and ready to go
* Basic instructions for installing MacOS on a Apple Mac system if requested
* Email support if needed

What we do not provide:
* Support or extra software to allow MacOS to be installed on any other system(s) then those already mentioned.
* Phone support

Note that all macOS installation media has a digital certificate from when it was created and some users may see an error message that the media is corrupt or somehow damaged so it can be used to install. The error message is always the result of not changing the date to some time in the past closer to when the media and digital certificate were created. Once the date is changed, the install can proceed.

The flash drives are usually just generic brands, but the type, size and condition may vary depending on stock at the time.
DVD's are also just what is in stock at the time of the order.

If you have any questions, please contact me prior to ordering.