Fits Whitfield Pellet Stoves:Profile 30 FS (< Serial # 11904)Profile 30 FS-2 (> Serial # 11905)Profile 30 INS (< Serial # 11904)Profile 30 INS-2 (> Serial # 11905)Quest FS (WP4) Rectangle Hole in FirebackQuest INS (WP4) Rectangle Hole in FirebackT300P (P11) (T300P/T301P/T305P/T308P)Advantage II (WP2) (Serial # 7401-18144)Advantage II-T (WP2) (Serial # 18145 & UP)Advantage III (WP2) (Serial # 18145 & UP)Advantage II-T Classic (WP2) (Serial # 75864 & UP)Optima 2 FSOptima 3 FSOptima 3 INSAdvantage Plus (WP7)Advantage Plus INS (WP7)Cascade (WP5)Profile 20 FS (< Serial # 7494)Profile 20 FS-2 (> Serial # 7495)