Bird S Pole 12 Extension is 12.5 in. but it is 16 in. overall size with one tapered end to insert into an existing 1 in. diameter S pole within this category. Slots and pins are on both sides and are used to secure the joints together of S Pole sections. Extension comes with a protective rubber cap as shown. A good way to give some extra height or if you need to replace pole sections.
Note: Only works with poles is this "S" pole category