· Cartridges are sealed with Membrane.
· Shorten the cartridge tips for more precise artworks, and artists can hold the grips more comfortable.
· Needles are perfectly fit on tips for better stabilization, minimize the vibration of the needles.
· Color Caps - Easy to find the right cartridges.
· The cartridges made and assembled in the most hygienic condition
· 100% sterilized by E.O. Gas. -- you can send some to Lab to verify at any time at any lot !
· Sold by box of 20PCS