Features: * brand new and high quality *Made of high quality material, durable and practical to use *The life of Aluminum head for using is longer than plastic heads *Arrow marked on valve, showing fluid flow direction, Prevents fuel from returning back to the tank and keeps it in the line. In this way, this product can perfectly solve the problem that your vehicle is hard or slow to start because the fuel is running back through the lines. *Also great for water pressure pumps & galley pumps which are not self-priming *Professional grade non-return valve - Ideal for marine, automotive, caravans/RV, and agriculture. *Stable characteristics, high reliability. *Easy installation and replacement. *Prevents fuel from siphoning back to the tank and holds it in the line. *Fitment: Fits for Carburettor and low pressure fuel systems. *For Use With Petrol, Diesel, Bio / Vegetable oil, Paraffin / Kerosene oil, Specification: Size: 6mm/8mm/10mm/12mm Material: Aluminu+NBR Rubber . Opening pressure: 0.2bar Working pressure: 0.2-6bar Operating temperature: -30 -130 Color: Chrome Package Contents: 1 x Non-return valve Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.