Quick view Kwikie Plug Wing Nut Kwikie Blank Duct Plugs - CAM 5120-25 (2.5), CAM 5120-30 (3.0), CAM 5120-40 (4.0), CAM 5120-50 (5.0), CAM 5120-58 (5.8) BLANK DUCT PLUG WING NUT 2.50 inch | 65mmBLANK DUCT PLUG WING NUT 3.00 inch | 80mmBLANK DUCT PLUG WING... MSRP: Was: Now: $9.66 Choose Options Compare