Metal ferrules
![metal ferrules](images/metal_ferrules.jpg)
Valco metal ferrules are available for tubing ODs from 1/32" to 1/4", in a variety of corrosion-resistant alloys.
Polymeric ferrules
![polymeric ferrules](images/polymeric_ferrules-no-peek.jpg)
Valco polymeric ferrules are available in a full range of materials, including some hard-to-find composites such as graphite-filled polyimide.