The JR 5mm Pipe 4pcs For Double Aluminum Rollers produced by Tamiya, is classified in Mini 4WD / Kids - Mini 4WD Spare Parts 2 - Roller These are separately available 5mm pipes used in many of Tamiya&39;s double aluminum rollers sets. Specs and Features 5mm Pipe for Double Aluminum Rollers x 4pcs. Usable with: -Item 15398 Double Aluminum Rollers (13-12mm) -Item 15403 Double Aluminum Rollers (9-8mm) -Item 15418 Double Aluminum Rollers w/Rubber Rings (13-12mm)