It is a Universal Rundle toilet. All low profile units have proprietary parts that do not exchange with anything else. You can get the parts at a U/R dealer, or a Sears Parts Store if you can find a counter man that knows the unit without having the Sears model number.: Have low profile toliet.cannot I.D., inside tank, looks like the letters URC. c is washed away,model 738-49741. Im looking for new internal parts, The stores locally have universal part. I dont think will work. Can I purchase new gutts. Anyone out there know the manufacture of this toliet? also there is a date oct,11 1983 stamped inside tank.any help out there? thank you