The brass compression is commonly used to connect lines for air, water, oil in a quick and simple way.SpecificationColor: Gold ToneMaterial: BrassFit Tube ID: 4mm / 0.16″Fit Tube OD: 6mm / 0.24″Insert Size: 6.5mm x 12.5mm / 0.26″ x 0.49″(OD*H)Ferrule Size: 8mm x 5mm / 0.31″ x 0.2″(OD*H)Nut Size: 10mm x 12.5mm / 0.39″ x 0.49″(Hex.W * H)Thread Size: M10*1.0Package List: 2 x Sleeve Ferrule, 2 x Insert, 2 x NutAdvantageMade of brass material, which is corrosion resistant, high pressure resistant, durable and has a long service life.InstructionThis brass compression kit can be connected to copper, brass, aluminum, or plastic tubing. No flaring tool is required for assembly.NoticePlease confirm the size before purchasing it!.