This window rubber is suitable for double glazed opening windows on caravans or motorhomes. It will fit a 27mm panel and comes with a 10mm diameter sealing bulb. You will need to measure the panel (wall) thickness of your caravan or motorhome and the diameter of your sealing bulb before purchase. This item is cut to your required size. Please select the number of metres your require during checkout., Manufacturer: Seals Direct