The Ferno 819 ORO2 Oxygen Regulator (#0819744) comes with a CGA 870 pin index connection, (2) DISS high flow ports, a fixed orifice flow control with window-style flow reading, and a pressure gauge measuring 0 - 4000 psig. 

Warranty: 5 Years. 

The regulator features a 12-position flow control with settings at the following numbers: 1, 2, 3, 4, 6, 8, 10, 15, and 25. The gauge features a regulated pressure of 57 psig at 2000 psi with a flow accuracy within 10% range.