Full Technical Description: Aluminum Material; 2 mil Blue Urethane Coated Interior, 40 mil PVC Coated Exterior Finish; 9 ft 10-1/2 Inch; 2.49 Inch Inner Diameter; UL, CSA Approval; ANSI C80.1, NEMA Rn-1 Applicable Standard; 170 ft Standard Package; 2-1/2 Inch Trade Size; Threaded End Style; OCAL-BLUE[R] Brand; Color Gray