Solid, Streamlined Design. Constructed of high temperature resistant polyetherimide (PEI) and silicone seals, the Lynx ST connector provides the reliability and strength you require. Three silicone seals ensure and maintain the flow path sterility for the 1/4-Perfect Steerable Transfer Carth, 1/2-Perfect Steerable Transfer Carth and 1-Perfect Steerable Transfer Carth Lynx ST connectors. Figure 1.