The safeguard universal closed vail adaptor is made to protect you from hazardous drug exposure. It is completely closed, mechanically trapping anything from escaping the vial and preventing contaminants from entering the vial. It is a safe and simple solution for reconstitution and transfer of drugs. It has precise liquid filter with different pore size from 0.2um,1.2um,5um,10um or 15um.The liquid filter can prevent the rubber or impurities during operations.The special design like frog legs to fit different vail sizes.