- Fully insulated housing; with rotating self-closing aluminum flaps
- Fully enclosed air chamber stops drafts, dust and reduces noise
- Telescopic housing for doors 1 3/4 – 2 15/16″ (44.5–75 mm) thick.
Spacers required for thinner doors (see documentation)
- Available in wide format to accommodate large envelopes
- Soft rubber weather exterior seal
- Insulating gaskets in all critical areas