Sync your oxygen cylinder up with a 870 Regulator from Drive. Help regulate oxygen flow incrementally to suit your needs. Drive's 870 regulator features a click style flow control, a large gauge, and a barb outlet. The 870 regulator meets or exceeds accuracy standards set by the ASTM, American National and CGA; moreover, the UL has approved it as well. The 870 regulator is to be used with: M6, ML6, B, C, D, E Post or T Cylinders.