This is the replacement snap disc upgrade kit on Travis Industries wood stove and fireplace models but may also fit on many of the other manufacturers and models based on fuel type and compatibility

Snap disc is mounted on the metal plate
Gasket and hardware included
Comes with instructions
Measurements: 4 1/16" T x 3 9/16" W x 2 1/8" D

As per this manufacturer's policy, we cannot sell parts provided by Travis Industries, outside of our selling territory in New England