The 12/30 mbar U Gauge Manometer, your go-to tool for precise pressure measurements. Designed with dual scale capability, this versatile manometer measures up to 12 inches of water gauge (in.w.g) or 30 millibars (mbar), ensuring reliable readings for a variety of applications. Dual Scale Measurement: Accurately measures up to 12 inches of water gauge or 30 millibars, providing flexibility for different needs. Hands-Free Use: Equipped with a built-in stand, allowing for convenient and hands-free operation. Secure Placement: Includes a suction cup for stable and secure attachment during measurements. Effortless Zeroing: Features a sliding scale for quick and easy zero adjustment, enhancing accuracy. Durable Construction: