THIS IS A CHROME SHIFTER SHAFT EXTENSION FOR UNITED PACIFICS CHROME SHIFTER PART NUMBER 21740. IT HAS THREADS ON THE INSIDE OF THE TUBE ON ONE END AND THREADS ON THE OUTSIDE OF THE TUBE ON THE OTHER END. IT IS 12 INCHES LONG AND HAS A DIAMETER OF 3/4 OF AN INCH. IT HAS 13 THREADS PER INCH. NEW, BULK PACKAGING. EACH.