Comfort living appliances has just released plans for a new flexible , yet light weight vacuum cleaner. The proprietary component of this device is the pivot function of the handle. The plans have indicated that there remains the possibility of variation within this pivot function. The designers have specified that the height of this section should measure 44.550mm in height but concede that anywhere between 44.500 and 44.645 is acceptable before the function interferes with the hose extender

what is the lower specification limit of this vacuum cleaners pivot function?