EATON Weatherhead 2030X5 Tube Support, CA360 Brass, 5/16" Tube OD, 3/16" OD (Pack of 10) Tube insert for use with PT200 and PT240 series 3/16" ID and 5/16" OD flexible tubing with compression fittings (not included) Brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability For use in low-pressure air, fuel, and oil applications