1. Offering different model and colors for the clients 2. Size: Diameter is 17.5-25; length is 125-152mm 3. Easier to get fire 1. Firing material of our product is rare earth elements cerium, lanthanum, And after adding Pr and Nd element, the qualiy of flint must be better.2. Flint size: length: 125-152mm diameter: 17.5-25mm3. Different colors can be offered, such as Black, Red, Silver, gold, ...