Fin Tubes Mfg. Co. Offers `L` Base Fin Tube. Fin Tubes Mfg. Co. Is the supplier of finned tubes, and inside/ outside integral finned tubes. `L` Base Fin Tube has the strip material which is subjected to controlled deformation under tension giving the optimum contact pressure of the foot of the fin onto the base tube thus maximizing the heat transfer properties. `L` Base Fin Tube has been provided with the foot which considerably enhances the corrosion protection of the base tube. It operates in maximum temperature of 150 degree centigrade.