12in X 18in No Dumping Allowed, 9900 Brilliant Grade Premium ⢠12 year limited White ⢠Fully Meets and/or exceeds the requirements of ASTM D 4956 for specifications for Type XI Class 1 retroreflective sheeting.080 Sign Mounting Style with Mounting Holes, Printed Language English, Sign Shape Rectangle., Width 12 In, Sign Material Aluminum, 0.