Diamond-Curati needle has smoother drug input amount and flow than general regular wall.
Due to silicon coated needle surface, pain of patient gets a lot lower since it decreases friction with the skin when the injection is made.
Hantech Medical has silicon coatings for both front and back side of the needle.
Purpose of coating for front side needle: It minimizes the friction with the skin and decreases pain of patient when the injection is made.
Purpose of coating for back side needle: It prevents possible damage of rubber seal when assemble with pen type syringe.