McWIL Courtwall works exclusively with Hardmaas-Glaverbel, one of the world's most experienced producers of structural glass play walls for indoor racquet courts. Hardmaas-Glaverbel, based in the Netherlands, began fabricating tempered glass court walls and hardware in 1975. Since 1994 the Hardmaas glasswall systems have been recognized and accredited by the World Squash Federation (WSF) as both suitable for play and in conformity with applicable impact standards and regulatory criteria relating to safety and structural integrity.