Thank you for viewing! [Installed] Elbow Back Low Short Type Pressure Reducing Valve Set [Sold Separately] High-Quality Stainless Steel Short Air Valve also available for 1,999 yen (see image 8). If you comment, I will change the price to a set price. The current 17 Super Great (April 2017) has an air pressure of approximately 13 kgf/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 leaks, internal link damage, etc.) There are problems, and it is necessary to adjust with a pressure reducing valve to about 8 kgf/cm2 to 9 kgf/cm2. [Pressure Reducing Valve Set Contents] ① Pressure reducing valve (regulator) ② Short elbow (domestic manufacturer product) ③ One-touch coupler (domestic product) ④ Special size bushing with screws (Compatible with two types of screws) ⑤ Seal tape ⑥ Installation manual with color photos will be enclosed. [After-sales support is also available] The special size bushing screws were manufactured based on the original (made in Japan). The bushing screws can be used for both blind plugs and test nipples. Air can be taken out at three locations: front and rear of the air tank, elbow direct → hexagonal taper screw. The pressure reducing valve is certified by the international standard ISO9001・2015 (quality) and can handle up to 16 kgf/cm2, so you can use it with peace of mind. The pressure reducing valve is checked for operation at the time of shipment and is set to approximately 8kg〜8.5Kgf/cm2 before shipping. Elbow 20Kgf/cm2 Air coupler 15Kgf/cm2 has been cleared. Please note that we are not responsible for any accidents, injuries, damage, or any other incidents that may occur during installation. [Notes] Regarding receipts, we do not issue them 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 asking questions regarding the diameter and size of the screws. Please refrain from asking for discounts. [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 Sundays and holidays. We will send it by Takkyubin Compact. Thank you for reading to the end.