These CF8 rough finish stainless steel (equivalent to type 304) funnels are designed to receive wastewater from indirect (not physically connected) waste lines. Item 9703 is available with top diameters of 4” (100) or 6” (150). Item 9704 has a oval top that is 8-3/4” (220) x 3-3/4” (95). Both models can be attached to drainage grates with the supplied stainless steel bolts and washers from underneath the grate.