Come and see our amazing products. The gauge with a metal keychain is made of ABS plastic and aluminum barrel. Able to measure up to 50 PSI. It allows you to find the right tire pressure and improve your gas mileage. Each aluminum gauge is available in a variety of colors and be fully personalized as well as laser engraved with your organization's name and logo. These make excellent promotional tools for dealerships, gas stations, hardware stores, car washes and so much. 3.35" L x 0.39" W. The price includes the shipping cost to CA,QTY over 20000pcs by ocean. Pls confirm further with us if any query about packing info, inventory status and time schedule.