This high-capacity flowmeter measures gas flows up to 40 liters per minute accurately. The clear polycarbonate tube with aluminum float provides clear visibility. The 1/4" BSP female threads fit standard gas systems. The adjustable needle valve enables precise flow regulation. The corrosion-resistant brass construction ensures long service life. The vertical installation maintains measurement accuracy. Ideal for high-flow MIG welding and industrial gas applications. The easy-read scale simplifies setup adjustments. The compact design (7" overall height) fits most workstations. A dependable tool for maintaining optimal shielding gas flow rates in production environments.