RAM 12 inch long by 1/2 inch NPT threaded pipe. 1/2 inch NPT pipe is approximately 0.80 inches in diameter and 14 threads per inch. These arms are used for many of the Lap Top Tray Mounting Systems. They are rigid pipes that can securely hold many different types of weights.
For use with RAM universal mount systems. Lifetime Warranty. (Picture may show different length)