Stainless steel adapter plate would accept (2) 7 quart (6.6 L) insets with an 8 ½" (21.6 cm) diameter. Used to convert full-size pan warmer FS-20SS 90020 to hold (2) 7quart (6.6 L) insets. Along with our full-size pan warmer, this part has been discontinued and is no longer available.