This Elegoo Mars 4 DLP resin tank is an original replacement product from Elegoo. The tank is made of an aluminum alloy, which makes it sturdy and durable. This means you don't have to replace your tank often. You can easily assemble and replace this tank. In addition, the FEP protective film is pre-placed and the bottom of the tank is designed so that the FEP film does not come into contact with your workbench. The tank is suitable for all types of resin.