Ensure A Dependable Jump Start For Your Vehicle With The U Part Jumper Cable L/Duty 200 Amp. This Heavy Duty Jumper Cable Is Designed To Provide A Reliable Connection Between Two Vehicles; Allowing For A Smooth And Efficient Jump Start Process. Whether Youre Dealing With A Dead Battery Or Helping Out A Fellow Motorist; This Jumper Cable Is A Must Have Automotive Accessory. Jumper Leads For Petrol Engines: 16 Mm 300 A And 25 Mm 400 A. Diesel Engines: 40 Mm 500 A.