Bubble Magus TS4 Single Dosing Pump Unit will dose from 3.5ml up to 40ml per minute.Unit has preset to 20 settingFoot Print: 3.25″ x 5″ x 5.5″Stepper Motor With 3 RotorsCNC Aluminum Pump Head Parts12v 1A DC Power SupplyUnit comes with tubing, extra connectors, greasePre Setting1- 3.5ml per minute2- 5.0ml per minute3- 7.5ml per minute4- 9.5ml per minute5- 12ml per minute6- 13.5ml per minute7- 16ml per minute8- 17.5ml per minute9- 19.5ml per minute10- 21.5ml per minute11- 24ml per minute12- 26ml per minute13- 28ml per minute14- 30ml per minute15- 32ml per minute16- 34ml per minute17- 36ml per minute18- 38ml per minute19- 39ml per minute20- 41ml per minute