Airgas Model 211C540 Chrome-Plated Brass High Purity Two Stage Regulator With CGA-540 Connection Safety Signage These regulators can handle flows

These regulators can handle flows up to 250 liters per minute of nitrogen with only a 5 psig pressure drop

Each regulator is capable of withstanding an internal vacuum and is provided with a diffusion-resistant

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Cortina 03-500-80 Pop-up Economy Cone 28" Orange 2# 6"/4" Collars w/light  (10 pack)

Airgas Model 211C540 Chrome-Plated Brass High Purity Two Stage Regulator With CGA-540 Connection Safety Signage These regulators can handle flowsChrome plated regulators are designed for high purity laboratory applications involving noncorrosive gases. Two stage design is recommended for use where constant delivery pressure is desired.