Thank you very much for viewing. Elbow change (image 2) Brass (140kg) → High-pressure SUS304 stainless steel (300kg or more) [Sold separately] Air valve (+1,999 yen) is also available. Maximum working pressure 60KG (image 9) If you leave a comment, we will change the price to a set price. The current 17 Super Great (April 2017) has an air pressure of approximately 13Kgf/cm2, and in the case of an air horn, it may not operate properly (sound distortion, diaphragm damage, solenoid valve malfunction). Kishun valve (malfunction, air leak, internal link damage, etc.) There are problems, and it is necessary to adjust the pressure to about 8Kgf/cm2 to 9Kgf/cm2 with a pressure reducing valve. [Pressure Reducing Valve Set Contents] ① Pressure reducing valve (with stay, no mounting screws) Supports up to 15kg ② SUS304 stainless steel elbow (high pressure, supports 300kg or more) ③ One-touch coupler (made in Japan) ④ Special size bushing screw (Supports two types of tank threads, front and back) ⑤ Seal tape ⑥ Installation manual with color photos will be enclosed [After-sales follow-up is also available] The bushing screw can be used for both blind plugs and test nipples. It is possible to take out from the elbow directly → three locations of hexagonal taper threads. The pressure reducing valve is certified by the international standard ISO9001・2015 (quality) and supports up to 15Kgf/cm2, so you can use it with confidence. The pressure reducing valve will be checked for operation at the time of shipment and will be shipped with the pressure set to approximately 8kg to 8.5Kgf/cm2. Elbow maximum working pressure 320Kgf/cm2 Air coupler 15Kgf/cm2 has been selected. In addition, we are not responsible for any accidents, injuries, damage, or any other incidents that may occur during installation. [Notes] We do not issue receipts as we are selling as an individual. Please understand. The appearance varies depending on the company. Please check the images carefully and confirm that it can be installed before purchasing. Please refrain from price reductions. [Regarding Returns] Please contact us within one week for initial defects. Please check as soon as possible after receiving it. [Regarding Shipping] Shipping is possible on weekdays, Sundays, and holidays.