Featuring swabbable design, Model 90403 is constructed with ABS red male luer lock body, polycarbonate female luer lock body, and silicone valves. When valve is accessed by male luer lock or male luer slip syringe, internal duckbill check valve allows fluid samples to be taken. One-way duckbill prevents accidental injection through connector. Upon disconnection of syringe, needleless valve will seal against any back pressure.