MIC-KEY Bolus Feeding Extension Set With Enfit Connector 24", DEHP-Free, Latex-Free, Non-Sterile. The MIC-KEY Extension Sets with ENFit Connectors are intended to connect to the MIC-KEY Low-Profile Gastrostomy Feeding Tube, Enteral Feeding Syringes with ENFit Connectors, and Feed Administration Bags with ENFit Connectors.