Mafrast watertight box. External size: 210x167x90mm. Internal size: 186x123x75mm. MAFRAST model: WR-07. Yellow. Watertight up to a 9-m depth. Made of shock-resistant resins, fitted with O-rings and covered with soft foam lining that perfectly adapts to the objects to be put away. Ideal for instruments and delicate objects to protect from shocks and humidity. The boxes are equipped with a special bleeding valve for underwater use. Yellow colour.