1、Excellent Aluminum Alloy: This oxygen pressure reducing regulator is made of excellent aluminum alloy, which is safe, reliable, durable and highly accurate in use.2、Fine Workmanship: This oxygen pressure reducing regulator has fine processing, tight connection of all parts, compact structure, beautiful appearance and safer use.3、Fine Pressure Gauge: The pressure gauge of this oxygen pressure reducing regulator is made of excellent ABS material with thickened protection design, which has clear scale, accurate reading and high sensitivity.4、Gas Filter: This oxygen pressure reducing regulator uses a gas filter with double protection for more energy efficiency and gas savings.5、Special Filtration Wetting: The gas in this oxygen pressure reducing regulator is specially filtered and wetted, so that the oxygen impurities are basically filtered, safe and non toxic.