... solid and durable, not easy to be rusty. semitransparent plastic tank for BF509A,acidproof and anti-alkalis, and collision resistance2. silent ... machine, also waterproof and static resistance.4. the large capacity tank with the flexible axle, equipped with a watershoot.5. ... 6. nice appearance, high flexibility and stablilization for large wheel plate, and base.7. suitable for the large-scale work shops ...