APEX POWER BOX is a range of modular manhole solutions offering new heights of innovation to underground asset markets. Constructed from a unique compounding method which incorporates granulated polycarbonate and structural foam; our chambers are robust, low in weight and highly resilient. APEX Powerbox is subject to stringent load testing surveys in alignment with relevant structural standards, this enables Parts Book to supply safe and reliable solutions to our clients with the confidence that comes from a tried and tested product range.