This is a single Adapter. This is used to connect a certain sized Hose to a different sized dust port on a tool. If you don't see a conversion you need please contact me at sales@turtlelanedesign.com.
NOTE: There is a "Classic" version of the 4" -> 2.5" where the dust port is centered on the connector and then there is an "Offset" version for less clearance below the dust port on your tool.
If you are choosing individual adapter, make sure you have the other half already. ie. If you select a 4" to 2.5" Tool Connector, you also need to already have a 4" Hose Connector. If you don't, check out the Connections Section or Starter Set section for discounts.
Terminology: The "Hose" side is what connect to the host attached to your dust collector. The "Tool" side is the dust port of your tool. *caps sold separately
