This is the replacement exhaust gasket that will fit many Drolet stoves and fireplaces but may also fit many other manufacturers as well based on size and shape

Fits: ECO-65(DP00060), Edison(DP00065), Euromax(EP00070), Eurostar(EP00055), 5000(OP00050, 7000(OP00070), Volta(OP00055), Alterna(PF09010)

Measurements: 4¾" outside diameter, 3" inside diameter