Manufacturer: Pisco, Ltd. [Features] Excellent sound dampening effect. Long life. Specifications: Reduction Volume (dB): 20, Effective cross-section area (mm2): 3.8, Working pressure (MPa): 0.9, Connection diameter: M5 x 0.8, Total length: 0.9, Outer diameter: 0.4 inches (24.5 mm), Outer diameter: 0.1 oz (10 g), Weight: 0.9 MPa [Material/Finish] Metal Parts: Brass + Electrolytic Nickel Plated Resin Parts: PBT Element: Polyvinyl Hormal (PVF)