370mm X 250mm X 300mm

[AutoWiz]

How can I buy the real thing instead of knockoff?

Directly from the manufacturer is not just a great way to ensure a genuine product, but it also ensures that you will have the latest version of whatever product you are ordering and that it has sat on a shelf for the least amount of time. For your Titan you would want E3D: https://e3d-online.com/ . For BMG you want BondTech: https://www.bondtech.se/en/ . For SKR and other chinese mainboards you want Biqu: https://www.biqu.equipment/ . And so on. No amazon or ebay or ali or other middle men. At best they can only add to the price. Biqu is in China so you gotta give them time to get you your stuff. And if you are going to buy yourself one of these extruders here in 2020 you really should spend your money on either the E3D Hemera OR the BondTech BMG. Both are dual drive. Sadly E3D is having troubles keeping up with demand for their Hemera. So really you should be looking at the BondTech BMG. For verification your titan extruder should have a holographic E3D sticker on it's side and the pancake stepper should have the E3D logo on it's backside. Like this..