Question: what are rl tattoo needles?
Answer: Round needles are marked RL (Round Liner) or RS (Round Shader) for short. You'll almost always see them written with their number in front, like 9RL. The number in front tells you have many needles are used in the configuration, so a 9RL has 9 needles placed in a circle configuration, a 7RL has 7 and so on.