How to determinate NXT original nozzle and copy nozzle

How to determinate NXT original nozzle and copy nozzle:

Look at two-dimensional code. Original nozzle is a thin two-dimensional code, posted up, the material is aluminum foil, each white dot two-dimensional code occupies each corner square lattice (four corners). Imitation of the nozzle, because of cheap, two-dimensional code using aluminum foil is thick, white spots on the two-dimensional code is not uniform, not full. (You can see the obvious from a microscope or magnifying glass.)

 Our company deals in the following products:

1.SMT equipment and accessories: nozzles, feeder, feeder parts, cutter, filter, guide, tape, mortor, belt, cylinder, smt grease/lubricant, sensor etc. 

2. Nozzles & feeders for fuji, for Juki, for Yamaha, for Samsung, for Siemens, CM602, CM402...have large stock.  

3. We sell and recycle used SMT machine

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