We designed Luer Adapters to make it easy for you to create your own quick connect Union or Adapter. This naturally colored, Polypropylene, Quick Connect Luer Adapter has a Female Luer to Male 1/4-28 threads. It conforms to ISO requirements for medical luer taper configurations and performance (45psi/3.1 bar). It also come with a 1/8 thru hole.