Alright, for all you folks handling fuel transfer operations - this VEVOR mechanical fuel meter is exactly what you need for accurate measurements. This bad boy handles flow rates from 10 to 20 gallons per minute with ±1% accuracy, which is seriously precise for the price. The 1-inch nominal diameter works with standard fuel transfer setups, and it can handle up to 50 PSI operation pressure. What's really handy is the large digital display that shows both batch quantities (3-digit) and total cumulative flow (6-digit) - no more guessing how much fuel you've moved. The aluminum alloy construction is rugged enough for industrial environments like warehouses, docks, farms, and mines. Installation is flexible too - you can mount it vertically or horizontally depending on your setup. It works with diesel, kerosene, gasoline, biodiesel, even cooking oils and vegetable oils. The package comes with Teflon tape for proper sealing right out of the box. Whether you're managing fleet refueling, agricultural operations, or industrial fuel transfer, this meter gives you the reliable data you need. The mechanical operation means no external power required - it runs off the flow itself. Much more affordable than electronic meters but still delivers professional-grade performance. Your fuel management is about to get way more precise and organized!