The latest barrier system from JSP with unbeatable stability A JSP® blow moulded barrier manufactured from UV stabilised impact modified HDPE. The design process was carried out in tandem with leading UK contractors to maximise wind flow through and around the system for unbeatable stability. Tested to ensure wind stability classes within BS8442 are achieved. Features & Benefits. Unbeatable stability - Designed in conjunction with leading UK contractors we have designed the Frontier Cross-Link® to maximise wind flow. This has led to a patent-pending barrier system with unbeatable stability. The Frontier Cross-Link® barrier has been tested to ensure its wind stability classes it within BS8442.