The Polypipe ICDB2 160mm Inspection Chamber Base Unit +4 Risers is an essential part of any drainage system, offering easy access for inspections and maintenance. Manufactured by Polypipe, one of the leading brands in the industry, this product is designed for reliable performance and durability. It comes with four risers and has a 160mm diameter, making it suitable for most standard installations. The base unit and risers are simple to assemble, ensuring a quick and hassle-free installation process.