Details This needle tips are compatible with only. Superior Anti-back-flow Needle Cartridge

• over 3 different superior needle cartridges covering various treatments such as micro-needling, collagen induction, bb glow, etc.
• 3ML large volume chamber.
  
• Unique wave-shape edge enables smooth operation, reduces air pressure, safer for skin protection.
• Needle material: Surgical grade stainless steel SUS316. High strength, high reliability and hygiene, widely used for various medical applications
• Anti-back-flow Silicon gel pad: Prevent fluid flow back into the device body preventing cross-contamination.
• Real silicon nanoneedle:
  
• Smooth liquid flow channels
  
• Fluid flow level adjustable
  
  
• Independent Package: High hygiene and safety standard.

Microneedling

• 0.25mm: Boosts application of products applied to the skin; Anti-Aging.
  

The technology is based on tiny pyramid-shaped 'micro needles' made out of silicon. The so-called MicroPyramid needles can be formed into arrays and used to deliver just about any active ingredient, including antigens for vaccination. The array is pressed against the skin and, because the gauge of the microneedles is so tiny, the patient feels nothing.

please see the below picture to see what's the needle shape exactly in a microscope

There are lots of so-called nano needles in the market at cheap prices, you will find it really colossal difference when magnifying it. Please see the below picture.