3M™ RPM (Raised Pavement Marker) products are 3M‘s high performance retroreflective pavement marking are constructed for prolonged durability which comprise of Housing, Spike and Micro Prismatic Lens. The housing and Spike are made from Aluminum alloy type DC12 by injection molding process and add the high strength iron performance in center of the Spike for special durability from impact and share force. The Micro Prismatic Lens supports the very high retroreflection in the night and rainfall condition and provide smooth and Flat-Top surface to reduce the dirty problem and be durable with corrosion environment.