ProX XT-CSB4FT-DOOR 4FT Heavy-duty Aluminum Ventilated Crowd Barrier Door and BaseProX XT CSB4FT DOOR 4FT Heavy duty Aluminum Ventilated Crowd Barrier Door and Base. This Lightweight Aluminum Crowd Barricade represents an exceptional solution for establishing a controlled perimeter with utmost efficiency. Crafted from high quality, corrosion resistant aluminum, this portable barrier ensures both durability and ease of setup. With its portable design, it effortlessly fits into various storage spaces and cargo vehicles, enabling