The gas 20 l sfc from bosch is a wheel mounted 19 litre professional wetdry extractor essential for any workshop it can be attached to power tools directly to extract wood dust and chip as you make it or can be used like a vacuum cleaner to clear up dust dirt and other mess around the work area it boasts an impressive 62 litre per second maximum air flow that allows vast amounts of dust and waste to be extracted quickly and efficiently the gas 20 l sfc isn39t just a dust extractor thoug