END DROP fitting is used to outlet the water with a stopper Outlet size- 90 mm (3 inches) round. You could use Round X Square adaptor fitting to connect our HYSQUARE pipe as outlet for better aesthetics. It locks the gutter inside the clip which prevents the edges from flipping out. Available in multiple colors to match your gutter color. Use silicone sealant inside the slot first and then slide the gutter inside it. Solvent cement is not required