This chamber set includes all of the components required to form a 300mm mini inspection chamber  - one base section, two 200mm sectional risers and a square PVC cover and frame)The overall depth of the chamber from the invert level to the top of the manhole cover is 740mm. If you need to make small adjustments to the height then the sectional risers may be cut to size using a standard fine-toothed saw.The main channel of the base is left open and the side inlets are blanked off with integral blanking plugs - simply remove the blanking plug by pushing it out from within the base to open and use the side inlets.The cover has a 35Kn load rating making it suitable for use in domestic driveways.For a brief overview of this product please watch the short video below; For a more in-depth description guide to the use of mini access chambers please take a look at the more detailed information video below.