Hunter inspection chambers are available in 450mm sizes and are designed to offer an easier, more economical alternative to traditionally constructed manholes. Deep Inspection chambers come with 110mm & 160mm size connections, are designed to go up to depths of 4m and offer an easy to install and economical option - They are reliable, quick and easy to install with ring seal sockets and a dry joint base to riser assembly. - Injection moulded in strong polypropylene materials with added diameter strengthening ribs offering high resistance against impact damage. - With finger friendly removable plugs. Plugs can be pushed out or re-sited as required. Integral support feet makes level bedding simple. - Manufactured in environmentally-friendly recycled polypropylene.