The Instrumentation Industries 60cm h20 NIF Pressure Meter is a great way to capture your patient's best effort of negative inspiratory force. This NIF meter has a bottom 1/8" small bore tubing connection and includes one reusable BE148-6 gauge adapter. Reusable . Sturdy . Accurate . Reliable . Needle can be easily “re-zeroed” . GZ-set (includes GZ NS60-PBR NIF Meter , GZ-BE1486 gauge adapter/GZ-SB – 1/8-06 tubing NIF (Negative Inspiratory Force) Meter Version: Size 60- cm H20