Water or sand fillable. Every unit leak tested. Takes 72 gals. of water 68"L X 36"H Connected length is 60" Accepts Fence Panels. 55"W X 8"H With posts, panels cover 60" Quick assembly and breakdown. Linked units secured with connector pin. Forklift access points. Can be moved while filled with water. Stackable. 820 LFT/truck (164 units) MASH Accepted WZ-387. Meets MUTCD Standards