The chamber covers allow easy access to wall and ceiling inspection openings, and recesses in which there are gas meters, water meters, electric meters, house hydrants, etc. Produced in large sizes, they also enable the construction of spaces in which large dimensions of distribution are located, eg. central heating dividers. They can also be used as wall and ceiling manholes. All covers are made of PVC and are equipped with a key lock. Their chamber structure makes the product stiff and durable, perfectly insulates thermally and acoustically. Specifications: - Material: PVC plastic; - Colour: white; - Size: 250x350mm, 250x400mm, 250x500mm, 300x500mm, 300x600mm, 400x400mm, 400x500mm, 400x600mm, 500x500mm, 500x600mm, 600x600mm, 600x800mm, 700x1000mm or 800x1200mm; - Equipped with key lock.