NANPU 1/4" NPT Air Regulator for Compressed Air System, 150 psi Steel-Protected Gauge auspowers_batchtwo Marks can be see clearly

Marks can be see clearly across a class or conference room

Each USB port have the separate switch and is controlled independently

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NANPU 1/4" NPT Air Regulator for Compressed Air System, 150 psi Steel-Protected Gauge auspowers_batchtwo Marks can be see clearlyNANPU 1 4" NPT Air Regulator for Compressed Air System, 150 psi Steel Protected Gauge Product Features 1 4" NPT Air Regulator w Gauge, Precisely adjust the air pressure and keep it constant Max Inlet Pressure: 145 psi; Operating Pressure: 0 125 psi Flow Rate: 20 SCFM (550 L Minute)@ 90 PSI Temperature Range: 41 140F Locking Regulator Knob, 0 150 psi Gauge, Metal Bracket,a pair of Air Coupler& Plug Kit, 2 x 1 4" NPT Fittings, 1 x Thread Seal Tape