- The back blister paper is easy to open
- Accurate Slot design fits 99% of pen machines
- The membrane inside is not easy to pull apart
- Membrane with 4 Thickened Bars，more durable
- Soft and Strong Flexibility Membrane Material
- Soldering material is better than the other brands
- All the needles with CE certificate sterilized by EO GAS
- Needles are more sharp and neat under the microscope
- Medical PC Material for the shell better than the other brands with PVC Material