... ,easy to use. Model YX940D Large Flow Aspirator is a novel modeling,high vacuum,high flow,and transportable medical suction unit.It ... :Maintenance free,double piston cylinder,oil-less pump,and high flow rate,without pollution by oil mist.The bottles hung beside the ... to use.Specifications :Max Vacuum:≥0.09MPa(680mmHg)Free air flow:≥40L/minLiquid storage bottle:3000ml×2Vacuum adjustable range:0.02 ...