This plastic cavity ventilation ensures optimum ventilation of the cavity wall. Advantages: - Optimal ventilation of the cavity wall - Raining in not possible - Repels mice, bees and wasps - Ensures dimensional stability when laying bricks - Easy to handle - Notches and grip edges - Available in several heights and colors This product is available in the colours: grey, white and black. In the heights: 5cm, 6cm and 9cm and packed per pieces, 600 pieces, 500 pieces and 282 pieces. This product is not in stock, expected delivery time +- 5 working days.