These pictures show a recessed Manhole and Marshalls Elite Firebrick Circle installed and cut to absolute perfection. As the pictures below show our skilled installers have so much pride in their work and take so much care when carrying out our installations. Take a look at the pictures below to see why Marshalls grade our Work as the highest possible standard. All of our installers and Apprentices work to the Marshalls strict Installation Procedures Manual. Which is why we have a consistently high standard.