Clark-Drain 300mm diameter clear opening square to round polypropylene recessed cover and frame with 35kN load rating classification. Corrosion resistant. Includes frame. Square to round frame with integrated step design. Circular opening fits all major manufacturer's of PPIC shallow inspection chambers. Driveway loading. Integral lifting keys. Cover can be turned to match direction of paving. Eliminates the need to cut paving around a circular opening. Recessed for block paving or slabs up to 60mm thick. 3.5T GPW loading. This manhole cover with frame is suitable for PPIC inspection chambers. The CD300SR is a square, recessed manhole cover that connects directly onto a small inspection chamber. It is ideal for Block Paving, Slabs or Screed. Connects to all UK leading manufacturers shallow access chambers (300mm diameter). 300 x 300 x 80mm clear opening. As the outlet connection is circular the cover itself can be rotated to match up with the paving pattern. Corrosion resistant. 35 KN (3.5 Tonne) Domestic driveway loading capacity. Comes with Integral Lifting Keys.