Cast Aluminum Expansion Plug Nominal size: 4.5 inches. Lightweight, easy to handle - up to 70% lighter than similar steel plugs. Durable cast aluminum - heavy duty, non-corrosive and maintenance-free; with natural rubber. Fill or Vent - threaded pipe stem has removable cap. Simple to install and work with - wing nut easily expands rubber seal. Special sizes are available to increase expansion plugs range. Plugs are used to create an airtight seal.
- Nominal Size: 4.5 inches , 114.3 mm
- Unexpanded Size: 4.215 inches , 107.06 mm
- Expanded Size: 4.724 inches , 119.99 mm