The Osma 450mm Universal Inspection Chamber A15 Round Cover & Frame 4D927 is a crucial component for any underground drainage system. This product, designed by the reputable brand Osma, is a solid and reliable choice to offer access for inspection and maintenance purposes. Its made from sturdy materials that ensure longevity under regular usage conditions. The 450mm diameter makes it suitable for various applications, while the round shape provides efficient fit in different structures. The A15 load rating indicates its suitability for pedestrian and light vehicular traffic.