The specifications of POM pepper balls with small size are basically made by injection molding. Pepper balls over 30mm are all made of POM bars by lathe processing. Pepper balls made by injection molding have high efficiency and low cost, while POM pepper balls processed by machine tools have low efficiency, high cost and high sales price.

The smallest size of POM pepper balls can be 3mm, the number of pepper ball molds can be more than 1,000, and the number of pepper ball molds with a diameter of 30mm can only be 8. The injection molding of POM pepper balls is relatively easy, and the POM material has good fluidity. The shrinkage rate will vary according to the product size. The larger the product, the larger the pepper ball is, and the accuracy is relatively good. However, it also needs to be finished by a ball grinder, otherwise it will be difficult to achieve high accuracy.