-It has 2 parts: Internal and External tanks.
-The inner tank is one piece. (Monoblock)
-External tank (consists of 2 pieces).
-It is also used as a safety tank.
-It is made of polyethylene material.
-It is flexible and impact-resistant .
-It is not affected by weather conditions.
-Production is made in the desired color.
-The opening cover is locked.