Plastic ball diameter tolerance range International common standard refers to the plastic ball as a standard accessories, the implementation of the international plastic ball standard PB / E308-20029, the standard specifies the size of the plastic ball diameter, diameter tolerance range, hardness and surface finish, detection and Test rules, packaging transport and water absorption ratio. Plastic ball international standard contains all plastic plastic ball, all the size of the plastic ball from 1mm to 100mm, which also contains plastic hollow ball, plastic hollow ball, plastic foam Ball and plastic float standard, the standard development of plastic ball is made with reference to the standard of the ball, but the hardness of the plastic ball is the hardness of the plastic raw material with the actual hardness of the plastic ball test, produced out. The following are the same as the "