I'm guessing a set of two limits or a set of nine inches OR a set of two supports
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Range is the span of your y values for each x
There is actually a set measurement for a "hand". The length of a hand is 9 inches and is called a "span". the width of a hand is 4 inches.
a normal span is a measurement from your pointer finger to your middle finger
That really cannot be answered without looking at the entire set of plans.
Hand span is the distance from the tip of your thumb to the tip of your little finger when your hand is outstretched completely.