After we have sailed into our new building and all, the book downstairs, I decided, this non-slip tape to buy in order to glue each of the nearly 45 stages. For 7 roles have been sufficient. The anti-slip band is due to its rough surface structure (it acts like sandpaper with very coarse grain size) of course not completely transparent, falls on our beech-levels but still not interfere. Important was also the anti-slip effect, and that is absolutely given. In addition, the tape sticks very well and is easy to process. Now we feel when going down again significantly safer - whether barefoot or with socks. A very worthwhile investment.