Ahoy! ???? While I don't have a specific listing for a 3mm flat sheet, I can certainly highlight a few steel products that might catch your interest! The Mild Steel Electrode Taurus 6013-3.2MM is a great choice at just R419, perfect if you're engaging in welding projects. If you’re looking for something versatile, the Welding Rods Mild Steel 3.2MM at only R44 is an affordable option for your needs. Alternatively, if you're after a larger format, the Guillotine Steel Base 448MM – capable of handling 20 sheets – is priced at R4023. Let me know if you need any further assistance on your shopping voyage! ??