Sarafina® carries top of the line felting needles that work best for a variety of applications. The gauge number is inverse to the impact of the needle: therefore, a lower number gauge has large impact while higher number gauge is for fine details. If you think of working from the inside of a project, outwards, 36 leads to 38 and then to 40 or 42. Felting needles also have different shaft shapes, triangle, star, and twist which add to the needle's performance.
40 Twist - The twist needle has a spiral shaft which intertwines fibers more precisely with a smooth effective pull. A 40 gauge is a fine needle for detailed and finishing work. I like to use 40 gauge in my 5 needle Punch Tool.
You get 25 needles in this bulk package at a discounted per-needle price.