Comparison : Item # E4000-2, Eliminator® II 1/4 Inch (in) Desiccant Dryer
Item # E4000-3, Eliminator® II 3/8 Inch (in) Desiccant Dryer
Item # E4000-4, Eliminator® II 1/2 Inch (in) Desiccant Dryer
Item # N4000-2, Eliminator® II 1/4 Inch (in) Desiccant Dryer
Item # N4000-3, Eliminator® II 3/8 Inch (in) Desiccant Dryer