Ibstock Red Class B Perforated B Engineering Bricks have a high compressive strength of 75N/mm2 for use below DPC and a 7% water absorption rating which makes them suitable for use above or below ground. Engineering bricks are used for their physical characteristics rather than their appearances. They have a smooth red contemporary finish and are a vertically perforated extruded product. PLEASE NOTE: The image is for representative purposes only, if unsure please order a sample Due to the Covid-19 pandemic, brick manufacturers have seen a surge in demand which has led to stock shortages and extended lead times. The price set against the product is based on them being in stock and delivered out of selected depots. We will always try to make sure that our customers' orders are fulfilled, but in the event we cannot supply the bricks within our selected network we will offer an alternative solution where possible.