Product review (5 stars): Works great.
This vent solved my problem. In an attempt to prevent field mice from entering the original vent, I had installed a wire mesh baffle in the vent tube, plus an external wire mesh cage covering the small vent hood. The mesh kept the mice out, but still, lint would periodically build up, making the dryer inefficient and requiring a periodic dismantling in order to clean it out. This new plastic vent did away with all that. The vent is completely closed when the dryer is off, therefore there is no rodent penetration. When the dryer is on, exhaust pressure opens the vent. Result: No lint build up, no mice, dryer works better. The plastic housing is stronger than I expected. After a light sanding I painted the housing to match the stucco of our house, so the vent is unobtrusive.