Manufacturer: Pisco, Ltd. [Features] This barb fitting is ideal for space-saving plumbing. Ideal for small appliances and small space-saving plumbing Great for plumbing vacuum equipment. [Uses] Fluid: Air; Usable Temperature Range: 32 - 122°F (0 - 50°C) (without freezing); Maximum Working Pressure: 0.5 MPa; Compatible Tube Outer Diameter: D (in): 6; Connection Diameter: M5 x 0.8; Compatible Tube Inner Diameter: D: 0.2 inches (4.0 mm); Maximum Usable Pressure (MPa): 0.5 g); Weight: 0 g); Material: 0 g); Material: 0 oz (1.5 g); Material: 0 g); Body: Brass + g); Plating (M3: Stainless steel. Or Quick machined steel + electrolytic nickel plating).