The PSSA is the trade association for companies involved in the supply of equipment and services designed to provide the highest levels of physical protection for sites and their perimeters from terrorist or criminal attack that involves the use of extreme force or explosives. Members of the association supply a wide range of high performance products including perimeter fences and walls, vehicle barriers and blockers, bollards, high security gates, security blinds together with other specialist equipment developed for this demanding sector of the security market.