Premier Copper Products D-130ORB 3.5-Inch Deluxe Garbage Disposal Drain with Basket, Oil Rubbed Bronze Disposal flange deluxe style with strainer basket with open/close function Dimensions: inner 3.5-Inch, outer 4.5-Inch by 2-Inch Compatible with In-Sink-Erator brand garbage disposal Drain size is 3.5-Inch It is made of brass