Thank you very much for viewing. 【New Ver.】 Pressure Reducing Valve Regulator, exclusively for large trucks. Comes with male and female check couplers (made in Japan). After checking the operation, the air pressure adjustment is tested at high pressure and then adjusted to 8kg to 8.5kg before shipping. The air pressure gauge will be removed and shipped separately to prevent damage during transportation. Current models: 17 Quon 17 Super Great Giga New VOLVO New SCANIA For the above models, the air pressure is approximately 12Kg to 13kgf/cm2. In the case of an air horn, it may not operate correctly (sound distortion, diaphragm damage, solenoid valve malfunction), or with a KISSHUUN valve (malfunction, air leaks, internal link damage, etc.). It is necessary to adjust the pressure with a reducing valve to around 8Kgf/cm2 to 9Kgf/cm2. 【Pressure Reducing Valve Contents】 ① Pressure reducing valve body (with stay) - supports up to 15kg ② Air one-touch coupler (made in Japan) ※ Installation instructions are not included. 【After-sales support is available】 The pressure reducing valve is certified under the international standard ISO9001:2015 (quality) and supports up to 15Kgf/cm2, providing ample margin for safe use. Please note that we are not responsible for any accidents, injuries, damage, or any other issues that may occur during installation. 【Notes】 We do not issue receipts as we are selling as an individual. Please understand. The configurations vary 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 thread diameter or size. Please refrain from asking for discounts. 【Returns】 Please contact us within one week for initial defects. Please check the product promptly upon arrival. 【Shipping】 Shipping will be done 1-2 times a day on Sundays and holidays. Shipped via Takkyubin Compact. Thank you for reading to the end.