Caravan or motorhome owner? This is a replacement 'Door 3' external access hatch for Thetford cassette toilets, specifically the C200, C400, C223, and C224 models (the '3 Series'). It's the little door on the outside of your vehicle that lets you pull out the waste cassette. If yours is cracked, broken, or the lock is faulty, this brand new Thetford part is what you need. Made in the Netherlands, so it's genuine quality that will fit perfectly. It comes as just the hatch/door panel itself – not a full cassette. No modifications or custom bundles, just a straightforward replacement part. A must-have repair to keep your toilet compartment secure and looking tidy. Don't let a broken hatch ruin your camping trip – fix it easily and be ready for your next adventure. Thetford is the leading brand, so you know it's right.