Used to warn drivers that the roadway ahead is susceptible to icing below freezing temperatures. MTO Book Location: New, Not in Book Reflective Engineering GradeHi-IntensityDiamond Grade Substrate AluminumGalvanized Steel Size 75cm x 75cm (30" x 30")120cm x 120cm (48" x 48")90cm x 90cm (36" x 36") Quantity Add to Quote