I got these vents for the fridge off the interweb. Cost about £8 each (I think). Could’ve used the crappy white ones from the caravan but they were crappy and white. Cutting the holes out with the trusty grinder and fitting the vents took about half an hour. Don’t forget to put sealant behind them to keep the nasty water out, young Vanbuilder. Also a good idea to paint over the cut edges with “Hammerite” or similar. Next!