Viper HS350 17" High Speed Scrubbing MachineViper HS350 17" High Speed Scrubbing Machine 50000298 Viper HS350 High speed single disc machine that is easy to operate and effective. The HS350 is ideal for heavy duty cleaning and scrubbing hard floors. This Viper Machine is deal for everyday indoor cleaning of hotels, restaurants, cafeterias, schools, malls, convention centres, as well as public buildings like schools and government offices. A high speed single disc machine called the Viper HS350