Large walk-behind scrubber dryers – easy cleaning of all kinds of floors The VIPER FANG 24T/26T/28T are large sized walk-behind scrubber dryers. Through platform design we can offer these floor scrubbing machines at an attractive quality/price level. Simple and easy to use controls. The VIPER large walk-behind scrubber dryers are robust (rotationally moulded housing), reliable and service friendly. With the ergonomic design you can easily see the floors around the machine. All machines have a transaxle drive system with a variable speed transaxle drive. It is easy to change the brush/pad pressure and can clean all kinds of floors.