Why Invisiskim?
Can accommodate up to a 40mm thick paver. 30mm and 40mm pavers are perfect.
However, for thinner pavers (ie 20mm) additional masonry material will be required to increase the total weight of the lid to meet Australian Standards 1926.3-0210 Amnt 1. The lid including the pavers requires 100N of force to lift - for safety reasons
(100 N of force is equal to 10.19) kg