Thank you very much for viewing. The third image is a temporary assembly. This product does not include air chuck couplers or nut couplers. Product: ・SUS304 stainless steel elbow Pressure Resistance: ・Supports up to 320kg, high-pressure対応. Thread Size: ・Internal 1/4, External 1/4 ・Diameter: Approximately 13mm Features: ・Thick-walled, specializing in strength, corrosion resistance, and heat resistance. Strength is 2 to 3 times that of brass elbows. You will definitely notice the difference when you hold it in your hand. This elbow is not available at home centers or online retailers. 【Notes】 The third image is a temporary assembly. This product does not include air chuck couplers or nut couplers. Regarding receipts, I am a private seller, so I do not issue them. Thank you for your understanding. The configuration varies depending on the company. Please check the images carefully and confirm that it can be installed before purchasing. Please refrain from price negotiations. 【Regarding Returns】 Please contact us within one week for initial defects. Please check the product promptly upon arrival. 【Regarding Shipping】 Shipping is available on Sundays, holidays, and consecutive holidays. 【Anonymous Shipping】Shipped via Yamato Transport's Nekopos service.