QuadGuard crash cushion systems are modular and customizable to the speed of surrounding traffic, tested effective in crashes up to 65 mph. This listing is for the QuadGuard diaphragm; other components sold separately. Diaphragm is silver and measures 30” x 30”. Includes monorail guide bolt pack. Size of diaphragm determines width of system; carefully check and compare against other components. 95TSS carries the full lineup of QuadGuard parts, including replacement cartridges, complete bays, and nose assemblies in various widths. Check also for QuadGuard crash cushion diaphragms in 24” and 36” sizing.