This is a replacement ferrule for our 2-Piece Quick Disconnect Coupler Kit (Part No. 3608-002) or our 3-Piece Quick Disconnect Coupler Kit (Part No. 3608-003). Two-piece kits use one ferrule; three-piece kits use two. Each ferrule requires 2 O-rings (sold separately).
Note: Sizes are not interchangeable. For example, a ferrule for 2" tubing will only mate to a coupler or sleeve for 2" tubing.