Perfect Size For Small Oxygen Tanks At Approximately 4.5 Compared To The 6 Of Typical Regulators * Made With An Aluminum Body And All Brass Core This Regulator Is Durable And Safe For Any User * Portable And Safe At 4.5 And Made Of Aluminum And Brass * Comes With Viton Yoke Seal With Outer Ring Constructed Of Brass * Includes Cga-870 Inlet Connector And Hose Barb * Easy To Read Dial In-flow Settings With Ribbed Flow Selector To Give Users An Easier Grip * Flow Rate: 0-15 Lpm; Includes Settings Of 1/8 1/2 1 2 3 4 6 8 10 And 15 * Limited Two-year Warranty *