Dell originally published the comic with 2 holes punched along spine to put in binder. Originally, Dell sold Radior along with four other comics (Sky Hawk, Viking Carter, Sleepy Samson, Greg Gilday) as a set of 5 comics for 10 cents in 1941.
7-in. x 10.25-in; 2-color printing; 16 pages-all newsprint. NOTE: At least two different colored versions exist for Sleepy Samson (black/red & green/red), so color variations likely exist for all 5 comics.