Impeller Gasket, Teflon/SR, for Durco/Flowserve Mark 3 Group 1, P/N 1C104-TFR (Summit), X-Ref# 1K104-TFR, X-Ref# AY51803A-TFR, also fits Summit Clark 3 Group 1 and others. (Item shown in picture is an example only and may not be actual product.)