0.68 caliber POM plastic hollow pepper ball, because of the material density, the density of POM hollow plastic pepper ball is greater than that of PP hollow plastic pepper ball and PA hollow plastic pepper ball, because the density of POM is 1.43, while the density of PP plastic is 0.93, so the hollow plastic pepper ball of the same size is heavier than that of PP material.

The advantages of 0.68 caliber POM plastic hollow pepper ball are high surface hardness, good smoothness and better sealing effect. In addition, POM plastic hollow pepper ball has the characteristics of hydrolysis resistance and oil resistance, especially diesel oil resistance, which is better than other plastic balls. Therefore, POM plastic hollow pepper ball is mainly used for sealing balls of oil tanks.