Features:1.HO High Strength: High strength, very flexible, not easy to break.2.High Performance: The bicycle inner tube is made of high quality butyl rubber, which has better sealing performance, ozone resistance, anti-aging, shock absorption and electrical insulation.3.Good Quality: Metallic material, ultra-high hermetic schrader valve, increase its durability, ensure no inflation for 180 days.4.Types of options: 6 different types for your choice, meet your different needs.5.COmpatibility: Suitable for mountain bikes, children's bike. Description:Reliable quality, real materials, good durability, tight connection, is an economical reducing valve. Specifications:Model:ST-JYF005799 Nominal Diameter: DN15-DN80(mm)Material:BrassStressful Environment: AtmosphericWorking Temperature: Room TemperatureApplication Medium: WaterFlow Direction: One-Way Driving Way: ManualPackage Included:1*Pressure Reducing ValveNotes:1. Please allow 0-1 inch error due to manual measurement. Thank you for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object.