Specifications include, but are not limited to: " DWU/MSD S/N: 082-1005 2.5"" Fire Hydrant Collar WHITE: It shall be dimensioned 3 3/8"" ID and 7 1/2"" OD x min .065 Thick with highly reflective sheeting material on one side which meets or exceeds ASTM D 4956 Type III. The reflective material will carry a 10 year manufacturer's warranty and the entire product will carry a minimum of a 2 year warranty from the vendor against all product defects including material workmanship. The backing shall be white durable plastic material and accept markings from a black or silver paint pen or sharpie. Ship To: 2900 MUNICIPAL ST. Dallas, TX. 75215; " DWU/MSD S/N: 082-1009 4"" Fire Hydrant Collar WHITE: It shall be dimensioned 5 1/4"" ID and 10 1/2"" OD x min .065 thick with highly reflective sheeting material on one side which meets or exceeds ASTM D 4956 Type III. The reflective material will carry a 10 year manufacturers warranty and the entire product will carry a minimum of a 2 year warranty from the vendor against all product defects including material workmanship. Ship To: 2900 MUNICIPAL ST. Dallas, TX. 75215 "