About tattoo needles types, which do what, how to use

The diameter of tattoo needle types can be found by looking at the first two numbers of the packaging. The 4 most common diameters are #12, #10, #8 and #6. #12 is a diameter of 0.35mm. #10 is a diameter of 0.30mm. #8 is a diameter of 0.25mm. #6 is a diameter of 0.20mm. #12, 0.35mm diameter is the most common diameter for most needles. #10, 0.30mm is the most common diameter for ones used for lining.
The count indicates the number of needles grouped together at the point of the bar. In the example we used earlier, a 1207RL needle, where 12 is the diameter, 7 indicates the count. So a 1207RL needle will have 7 needles soldered to the tip of the bar.
Tattoo needles types: RL or round liner needles grouped together in a tight round formation. RS or round shaders are grouped together in a loose round formation. F or flats are grouped together in a line formation. M1 or weaved magnum are grouped with 2 rows of needles in a weaved formation