Features: Make from Stainless Steel, rust resistant, durability, and suitable for seawater environments. High filtration accuracy and stable pore size provide excellent purification, effectively removing suspended matter and particulates, protecting the valves cores and extending regulator life. High porosity and uniform, smooth pore size provide low initial resistance while maintaining good airflows for smooth breathing at depth. Dustproof and stain resistant design resists from debris, rust, and oil, keeping the air way clean and reducing maintenance. Easy installation and replacement. Great for daily maintenance, and a great spare in your dive tool set. Specifications: Component: Stainless Steel Size: about 18x10x6mm/0.71x0.39x0.24inch Package Includes: 1set Pressure Reducing valves Filter note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.