40 Pieces 3D Printer Nozzle Cleaning Kit, 28 Pieces 0.15 mm, 0.25 mm, 0.35 mm, 0.4 mm, 0.5 mm Nozzle Cleaner with Storage Box, 8 Pieces Cleaning Copper Wire Toothbrushes, 2 Pieces Tweezers

I didnt buy this product to clean printer heads. I bought it to clean gas furnace pilot light orifices. This is the only product I found that has wire gauges small enough to clean gas furnace pilot light orifices. Sizes for natural gas pilot orifices run from .014 to .026 and for LP from .006 to .013.

Pros: I received all items it the picture including the tubes. Cons: Tweezers are damaged at the ends. All cleaning needles smaller than 0.4mm are in the same tube with no marking to distinguish the difference. I will not be able to tell the 0.5 and 0.25 apart. Only two of the needles have a loop handle (The image displays six in the add).