KBA offers various types of pipes and tubing from our permium present pipe with OEM routing and hanger positions, and our flex tubing with flex lock construction that provides leak - free ot ALS (Aliminized steel) and LCS (Low Carbon Steel) straight tubing, offered in 1-1/2" to 4" diameter with some in 5" to 6" diameter, to fit a wide range of applications, in 13 to 17 gauge material.