This base plate pairs with the most common 8′ Upright. 14″ x 16″ Bases are designed to pair with fixed height or telescoping Uprights up to 8′ high. These bases feature a stacking slot and are available with 1.5″ or 2″ diam. x 3″ or 6″ high pin sizes. The stacking slot of the base is always on the second dimension of the base, so for this base, the stacking slot is on the 16″ side. The taller you go with your Upright, the heavier the Base you need.