MOCAP Tapered Polyethylene Plastic Plug Caps are inexpensive dual function closures which can be used as either a plug or a cap. These tapered polyethylene plug caps are made from tough but flexible polyethylene to form a secure fit, yet easily removed. Outside Length: 1.00in / Flange Diameter: 3.13in / Small Inner Diameter: 2.685in / Small Outside Diameter: 2.76in / Large Inner Diameter: 2.949in / Large Outside Diameter: 2.99in