From EnviroBuild
The MESA Self Levelling Joist Slope Corrector is the perfect accompaniment to MESA Support Pedestals for tackling sloping surfaces. Fix on top of pedestals to correct slopes up to 5%.Please note the Joist Slope Corrector can only be used with MESA Support Pedestals ranging from heights 19-595mm. (this does not include 10-40mm pedestal)Self correct slopes up to 5%Easy clip in system, adds 20mm height90% recycled Polypropylene and 100% recyclableQuick & simple to install, saving you over traditional supports1 per pedestal