Tactually identify everyday items with Bump-Dots. These identifiers are made of a durable polyurethane polymer designed for high tactile usage for those with visual impairment. These dots are a great way to tactually mark appliances, telephones, computers, typewriters, etc. Smooth, raised tactile dots have adhesive back for easy application with only thumb pressure. Adhesive will hold firmly to any clean, smooth, flat surface without damaging product surface. 20 Bump Dot identifiers per pkg. Diameter: .44 x Height: .20 Product dimensions (imperial): 0.2 inch H x 0.44 inch L Product dimensions (metric): 5.08 mm H x 11.18 mm L