Spare parts are numbered in the form - Product name # number.
The number after the # grid indicates the part of a specific spare part. Especially for rods, the smallest number #1 is the tip, and the largest is the handle. The handle will be marked as #2 for the two part rod. For three part rod the handle will be marked as #3, because #2 is the middle part. The exceptions are feeder rods, where the tip is not the spare part itself, and the mark #1 represents the uppermost part of the blank itself - the part where the feeder tips are inserted.