This EasyDial Reg Oxygen Regulator fulfills all your needs. Want to know how? Then browse through below highlights of it. -Due to Its Compact and Lightweight: The Easy Dial Reg is only 4-1/4" long and weights a mere 7.8 oz. as a result of the offset gauge and new multi-spring technology. -Due to Its User-Friendliness: The unit's easily accessible flow adjustment knob is large and knurled making flow adjustment a cinch, even for the physically challenged. -Due to Its In-Built-Safety: The Easy Dial Reg features a built-in pressure relief valve, as well as a protected contents gauge. The low force Viton yoke seal provides a better tank-to-reg seal. -Due to Its Accurateness: Unique design minimizes normal flow variation that occurs as tank pressure drops. Due to Its Flexible & Versatile: Comes in two (2) body designs, yoke or nut style, and is available in five (5) flow ranges: 31-4000 cc/min, 1/32-4 lpm, .50-15 lpm and .25-25 lpm.