Arubis rubber balls can be ordered with or without a metal core. A small metal insert can be placed inside the rubber compound to make it a metal detectable ball. Another function of rubber balls with steel core is to have random bounces. These balls with metal insert are commonly used to clean parts in the sifting industry normal balls can’t reach. Can be metal detectable Used for random bounces Custom diameters on demand Balls with metal core Arubis provides metal detectable balls with a metal insert, often referred to as detectable sifter cleaning balls for most sifting applications. These magnetic balls with metal core will prevent sifter screens from clogging. Balls for random bouncing Deblinding balls can be produced on demand and in any kind of shape. Standard production includes parallellepipidum balls and special egg form balls.