Counterfeit or passing off, whatever you call it, it is without a doubt meant to imply it is manufactured by 3M, without directly infringing their trademarks which is why it is backed with red, and has 3 and M strategically placed on the role. Yes it will be sticky, no doubt, but it won't have the R & D and precise manufacturing standards as 3M, and hence may not last as long, but worth a try for £3.99.