Brass Compression Fitting For Plastic, Copper, & Aluminum Tubing, 0.13 Inch Tube OD Union

With a 0.125 inch tube OD, it matches 1/8 inch outside diameter tubing. It is intended for aluminum, copper, and plastic tubing, and it is not recommended for steel.

Plastic tubing works fine with this fitting, same as copper and aluminum. One thing worth knowing though: most plastic tubing types require a 2030 insert during assembly. The exception is Eaton PT230, which doesn't need it. Metal tubing runs from -65°F up to 250°F. For plastic, check that your specific tubing type is rated for the working pressure you need, since the max 2000 psi rating applies depending on tube size and material.