No need to carry additional fuel — this handy little unit takes all the dirty work out of refilling camp stoves. Just stick one hose end into your gas tank and the other hose end into your stove and start crankin’. As long as you turn the handle, transferring ensues. To stop siphoning, just stop crankin’. Transfers a gallon of liquid in about 2.5 minutes. 4"×2.25"×2.75", 5 oz.