Titanium 6MM (1/4") tube coil 4"od heating cooling

Titanium 6MM (1/4") tube coil 4"od heating cooling

I am selling a crude handmade titanium tube coil, suitable for saltwater fish tanks, heat exchangers or similar heating/cooling applications. The 6 millimeter OD (0.4 mm wall thickness) titanium tube was bent by hand into a coil with 4 inch outer diameter. The end leads are 9 inches long. The picture shows an inch ruler for scale. The material is soft and would allow shape adjustments by hand or with suitable tools. I must warn, however, that you would not get a tighter diameter than 3 inches without risking sharp bends on the tube that would block the flow. This titanium tube is not really suitable for tighter coils than 3 inch diameter.
The weight of this material is about 40 grams per meter (12 grams per foot). The total weight of the coil is 162 grams.