These street name blanks have high intensity sheeting applied to both sides of the blanks and are ready for your vinyl letters. Extruded blanks are made of thicker aluminum than the flat street name blanks providing more strength and support.. Blanks have square corners and are available in 6” or 9” heights and a variety of different lengths. Blanks are available in green, white and blue. Custom colors are available. Please call 1.800.443.7103 for custom blank orders.