Our NEW Interior Whip comes with a pair 1.5", 1.75", or 2" clamps.  Please choose clamp size at check out.  This Interior whip can tie into your existing 187 controller if you already have our 187 whips.  If using with existing whips please check "Without Controller".   (This Interior Whip's clamps are 46 inches apart.  Please confirm it will work with your cage.)