Feature: 1. Possess firm connection, high pressure resistance, tightness and repeated installation, simple and convenient installation and maintenance, safe and reliable work 2. Good for fire prevention, crack prevention, high‑altitude operation and can eliminate the disadvantages caused by careless welding, no welding is needed 3. Finely ground with a special process surface, the hand feel is glossy and delicate, the interior is cleanly and bright, and the ruler can be accurately controlled 4. Ferrule type installation is environmental protection and reusable, easy to operate, convenient and free to disassemble, break the traditional installation method 5. Suitable for hard tube conversion hose and need to penetrate the wall and board occasion Specification: Item Type: Ferrule Compression Fitting Material: 304 stainless steel Purpose: Occasion where the hard tube is converted to a hose and needs to pass through the wall and board Conversion Model Diameter(hard tube x hose): Approx. 6 x 4mm / 0.2 x 0.2in8 x 5mm / 0.3 x 0.2in 8 x 6mm / 0.3 x 0.2in 10 x 6.5mm / 0.4 x 0.3in 10 x 8mm / 0.4 x 0.3in. Package List: 4 x Ferrule Compression Fitting