[POL to QCC1/Type1] The propane tank gas gauge meter converts POL hoses and regulators to QCC1/Type1, suitable for 5-40 lb propane tanks, this propane tank gauge level indicator is suitable for most propane tanks. NOTE: If the temperature is lower than 0 Celsius (32 Fahrenheit), the meter may be inaccurate. [Color-Coded Dial] The color-coded dial of the propane gauge has three levels: gas (green), low gas (yellow), and supplement (red). The fuel level can be read at a glance without having to disassemble the fuel tank, lift or shake the propane tank. [High Quality] The propane gauge indicator is made of high-quality brass, which is heat-resistant, scratch-resistant, and corrosion-resistant. It can provide perfect sealing connections for furnaces, RVs, and storage tanks, and is . NOTE: When installing furnace appliances (oven, heater, etc.), make sure the furnace appliances do not leak. [Easy to Install] The propane tank gauge has a suitable length and can be tightened without