| Ventilation holes according to order 1. Ø 3.5 mm c/c 6.3 mm = 4616 mm2 /rm 2. Ø 5 * 7 mm c/c 13.0 mm = 2279 mm2 /rm More information on product page. |
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| Ventilation holes according to order 1. Ø 3.5 mm c/c 6.3 mm = 4616 mm2 /rm 2. Ø 5 * 7 mm c/c 13.0 mm = 2279 mm2 /rm More information on product page. |
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