Features This non return valve is made of aluminum,which is durable in use. Fit for Carburetors and low pressure fuel systems The fuel non return check valve can well prevents fuel from returning back to the tank and keeps it in the line Excellent workmanship and convenient to use, bring you greater convenience. Size: 6/10/12mm(Optional) Features: 1. Prevents fuel from returning back to the tank and keeps it in the line 2. Fit for Carburetors and low pressure fuel systems Specifications: Material: Aluminum Color: Silver Size: 6/10/12mm(Optional) Notice: 1. Please allow 1-3cm error due to manual measurement. Please make sure you do not mind before you bid. 2. The color may have different as the different display, Please understand. Package Included: 1Pcs X Aluminum Alloy Fuel Non Return Check Valve One Way Petrol  (6/10/12mm Optional) Package List