3M Diamond Grade 4000-4090-30X50 ~ DG? Durable Reflective Sheeting 4090 White (30 Inch x 50 Yards)3M Diamond Grade DG? Durable Reflective Sheeting, 4090, white, 30 in x 50 yd 3M Diamond Grade DG? Reflective Sheeting is a microprismatic retroreflective sheeting designed for the production of traffic control signs and delineators The 4000 Series sheeting features industry leading, Full Cube Prismatic Lens technology, making it 3M? s most efficient retroreflective sheeting Returning 58% of available light both in daytime and at nighttime, this