Closing heads type GF-28 are the devices co-operating with different types of closing machines and can be installed in closing machines of following companies ROBAK, ALCOA, STORK, KRONES, NAGEMA, Dr. DATZ, ZALKIN. The heads serve to make the closures of plastic and glass bottles using closures type Maxi–Crown dia. 28 mm. The heads are made of stainless steel, tool steel and non-ferrous metals.