The Osma 315mm Multi-base Inspection Chamber Base Inc. 2 X 45° Multi-base Branch 110mm 4D917 is an essential component for any drainage system. Crafted with high-quality, durable material, this product ensures longevity and robustness. The inspection chamber base includes two 45-degree multi-base branches, which offer flexibility for various configurations and installation requirements. With a diameter of 315 mm and a branch size of 110 mm, it provides optimum functionality in managing water flow effectively.