This item is a Fill Funnel Retainer Nut, part number 8531326, from a Whirlpool dishwasher.  It came from a Whirlpool model GU1500XTLS3 or model GU1200XTLB3 dishwasher, but will fit outher brands and models where the part number matches. Some wear and residue from normal use, but fully functional. Listing price includes free shipping, USPS First Class