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From the Harmer Modulock deck support system, this self-levelling flat head is an alternative to buying the Harmer Modulock self-levelling head without tabs for slabs, timber and decking to slot into. It is cost-effective and accompanies the rest of the system support perfectly.The deck supports makes the heights of paving slabs, timber and plywood sheet decking adjustable so that you can level out irregular surfaces. In turn, areas are more functional. It is a raised pedestal system that aids in concealed drainage, pipework, and services underneath a substrate. The system is also compatible with walkways, terraces, balconies and ballasted flat roof applications.Features & Benefits: Harmer Modulock Deck Support Self-Levelling Flat Head, Cost-effective, Part of the Harmer Modulock deck support system, Useful and functional product, An option to purchase Harmer Modulock self-levelling head without tabs for slabs, timber and decking to fit intoDeck supports are easy to operate and come with self-levelling heads to create a 5% gradient change. Heads have rubber layers that allow for anti-noise and anti-slip.. Harmer Modulock Deck Support Self-Levelling Flat Head Polypropylene