Available for the Rustibus 20 Needle / Chisel descaler has a flexible nose piece that allows the user to get into every corner. This vacuum system also allows the tool to exhaust into the vacuum stream. Requires only 87 CFM / 2.5 M3 vacuum flow and 90 psi / 6.2 bar operating pressure. N.B. To use this vacuum system, your Rustibus 20 needs to be fitted with 18 cm (7”) needles. Includes : vacuum attachment, connection hoses and clamps.