EATON Weatherhead 2030X8 Tube Support, CA360 Brass, 1/2" Tube OD, 3/8" OD (Pack of 10) Tube insert for use with PT200 and PT240 series 3/8" ID and 1/2" 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