2" Yellow – To clean 2"-2.5" Pipe I.D. – SPG-2E, 3" Blue – To clean 2.5-3" Pipe I.D. – SPG-3E, 4" Green – To clean 3/3.5/4" Pipe I.D. – SPG-4E, 5" Light Pink – To clean 3.5/4/5" Pipe I.D. – SPG-5E, 6" Red – To clean 5/6" Pipe I.D. – SPG-6E