THE SHORT ONE EXTENDS FROM 13 TO 19 INCHES. -THE LONG ONE EXTENDS FROM 20 TO 33 INCHES. -OPENING SLIDE INTO 2 INCHES PIPE DIAMETER-EASY TO INSTALL ON ROOFS OR SIDE WALLS. -PROVIDES TRIANGULAR SUPPORT TO FOOT MAST. -SCREWS INCLUDED. In addition, Pitch pads are included to proper seal. P