What are the models of nano-microneedle and how to choose different models of nano-microneedle?

There are three series of nano-microneedle, 2DL, 3DL, 5DL, the difference is: 2DL nano-microneedle wafer area is 2㎜*2㎜, the price is relatively low, it is mainly suitable for the eyes, ears, and other sensitive and small parts. 3DL nano-microneedle wafer area is 3㎜*3㎜, the price is relatively moderate, it is suitable for all the parts of face. 5DL nano-microneedle wafer area is 5㎜*5㎜, the price is relatively high, it is mainly suitable for large areas, abdomen, back, chest and legs, and so on. The 5DL Nano Microneedle has a wafer area of 5mm*5mm, which is relatively high in price, and is mainly suitable for large areas, such as abdomen, back, chest and thighs, etc. The most used area is the abdominal wrinkles. Each series of nano-microneedle has three models, which are 2DL-D (2DL low needle), 2DL-Z (2DL medium needle), 2DL-G (2DL high needle); 3DL-D (3DL low needle), 3DL-Z (3DL medium needle), 3DL-G (3DL high needle); 5DL-D (5DL low needle), 5DL-Z (5DL medium needle), 5DL-G (5DL high needle). 5DL-G (3DL High); 5DL-D (5DL Low), 5DL-Z (5DL Medium), 5DL-G (5DL High). These different models are easy to understand, indicating that the needle height of the nano-micro-needle has three grades, low, medium and high. They are used to select different models for different areas of the skin and for different skin types. Those with thicker skin texture choose high needles and those with thinner skin texture choose low needles. However, nano-micro-needle is used together with nano-micro-needle penetration promoter, and the penetration promoter itself has an adjustable needle height, with a range of 0-2㎜. Therefore, when we choose, we can directly choose -Z (center needle).