- Entirely built in condensation-proof impact-resistant PVC
- ABS corner fittings
- Alveolar PVC «curved» flap for optimum orientation of the incoming air flow
- Air seal baloon gasket on the upper side of each flap
- On both flap sides, beside the air seal brushes,lateral side seal gasket allow an hermetic closure.
- Smooth surface flap to improve the flow of incoming air and minimise dust deposits
- A stainless steel clamp on both flap sides allow to adjust the closure of all flaps at the same time, tightening the linkin stainless steel rod.
- Sides’ frame with 4.5 cm bar