Comfort Living Appliances has just released plans for a new flexible, yet lightweight 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 44.550 mm 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 (LSL) of this vacuum cleaner's pivot function