Material: Stainless Steel Type: Horizontal or Vertical The products have passed international test standards and are certified by FM Approvals.test water pressure: With a water level of 70cm and average speed of more than 1 m / s. . Wave test: With wave height should be 10 cm. There is no leak in 30 minutes and is certified by FM Approved. Obtain patents from America, China, Japan, Malaysia and Taiwan. The flood retaining door can be operated easily and installed in 10 minutes with only 1 person. 100% watertight and has been sold to Australia, China, Japan, Indonesia, Philippine and Thailand.