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The BT-Spannschloss® (turnbuckle) is part of an easy to use connection system – without additional materials and tools.


The ThermoPin® securing anchor system is a glass fibre reinforced plastic (GFRP) connecting anchor for sandwich walls and core-insulated double walls.

GFRP spacer bar

The GFRP is a profiled spacer made of glass fibre reinforced plastic. The spacer guarantees accurate production of core-insulated double walls.