Portable Nylon Mini Bicycle Pump Air Injection Nozzle Lightweight Tire Inflator 80PSI Manual Hand Pump for Mountain Road Bikes

My own readings, in pounds. The first point is the first reading I took; after that a point goes on only when a reading comes in 5% or more away from the one before it, which is why the gaps are uneven. The price above is a later reading that landed less than 5% from the last point, so it has no bar of its own.