Stacker poles are $12 per pole. They do not come in a pack. If you have an Aerial Assault, Double Eagle, Red Pigeon, White Wing FlyWay 90 or White Quail you will need 2 LG diameter and 2 SM diameter stacker poles. The Fowl Play, FireFly, Raven, FlyWay 30, FlyWay 80, & FlyWay 60 they are all the same diameter for all 4 poles.