This 72mm coursing block with nib is intended for masonry work, mainly within chimney and gas flue systems on pitched roofs. Its dimensions allow consistent brick courses and a secure connection with clay flue liners during construction.
Suitable for installers working on gas appliance flues, the block provides reliable support to flue liners and assists with liner alignment. Its manageable size is valued during chimney stack assembly, helping to maintain neat, even courses and a stable build.
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