The 4000-ST general purpose vacuum system produces vacuum of up to ten inches of mercury with an open air flow of 2.3 lpm. It comes complete with pen holder and 9 tips: PVS-CB-12,PVS-CB-14,PVS-CB-18/PVS-CB-38/PVB-CB-332,PVB-CB-316,PVB-CB-14,PVB-CB-18,PV