Useless - do not buy
I bought this product thinking it would be good to use over paper postage labels printed off my laser printer. Apparently using regular shipping tape can throw off the bar code readers USPS, UPS and FedEx use due to the shiny nature of the tape. The idea is that because this tape has a matte finish, the bar code readers can read through it without the reflective interference shiny tape would create. Each time I would try to pull a piece of this tape off it would split down the middle and I'd have an uneven piece of tape. It's also very hard to apply this tape to a label without the tape bubbling up and obscuring the bar code. I figured I must be doing something wrong...3M products are usually of excellent quality. This product, however, is a waste. I threw the full roll away.