These are Resintuff composite manhole covers designed for high load capacity and anti-theft security.Load Rating: The covers are rated EN124 D400, meaning they can withstand loads up to 40 tonnes, suitable for heavy traffic areas.Material: Made from composite materials like FRP (Fiberglass Reinforced Plastic) or SMC (Sheet Molding Compound), which are durable, lightweight, and have no scrap value to deter theft.