The swing base, 2-section pole is the EB2 model with an easy to use swing base. It is available in heights ranging from 16’ to 22’. The pipe is approximately 1/8” in thickness. The bottom section has an outside diameter of 3 1/2” and the top section has an outside diameter of 2 3/8”. SB model poles up to 18’ can be shipped via UPS. Every Old Glory flag pole is an attractive and functional addition for businesses, schools, churches, athletic facilities, and homes. Pole is extruded (seamless) aluminum pipe using alloy #6063-T6. This gives the pole maximized strength while at the same time minimizing the pole’s weight. The pipe is then anodized bright silver. The pole’s castings come from poured aluminum using alloy #535 and are run through a wheelabrator to give it lasting shine. The easy-to-use couplings allow the pole to be shipped in smaller sections while also making the pole easy to handle, assemble, and service. This patented design has withstood the test of time. Specify pole length. 100% Made in USA