This Nebulizer Adaptor, manufactured by Teleflex Medical, is specifically designed to be used in conjunction with a prefilled sterile reservoir.
This adaptor, additionally, is a venturi adaptor that allows the user to control the selection of oxygen concentrations. The yellow nebulizer adaptor allows selections from 28% to 98% and the blue adaptor allows selections from 33% to 98%.
If this venturi adaptor does not meet your medical needs, check out this venturi adaptor here.
Nebulizer Adaptor for Prefilled Reservoirs Features and Benefits
 
Designed for use with sterile water for inhalation.
Offers variable selections of oxygen concentrations.
Venturi-style.