Continental A65-100 Carb Heat Box. 1/2" diameter height - 1" smaller flange. Metal. Available with or without tube.
Note: Filter sold seperately. Use P/N: BA4106 for Filter Assembly.
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Per supplier: No, it is not. You will need to get a 337 approval for this to be installed on a certified aircraft.
The air filter that is used with Part # 05-01387 is a BA-4106.