DNF (4) Black Round Ring Spring Cup Connector Speaker Box Terminal/ Subwoofer Enclosure Color: Black Material: Plastic and Gold Coated Cutout Diameter: 2" This terminal works for banana plugs and the terminal pins do not stick out over the rim. Our screws will not move and air will not be able to get in after mounting due to the high quality, secure glue that we use. ALL ITEMS ARE SHIPPED WITHIN 24 HOURS, EXCEPT WEEKENDS!