Brooks SLAMf Thermal Mass Flow 
Tag: MF50S/AZ07
Model: SLAMF5031GJB1A2A1
Gas: N2 
OP Press: 30 PSIG 
Max Press: 1500 PSIG 
Max Temp: 149F (65C) 
F.S. Flow/Range: 20 SLPM
CAL. REF. Temp.: 70F 

New and unused. 
Comes as shown.
See picture for details. 

Please make sure this is the correct part for your use before buying.