LEGO's blue bucket contains many small blocks and their width is 8 mm. So using such blocks 8mm tape block is assembled.
First to make tape sliding base 1mm cut of the block surface is necessary. If you have a milling machine it is easy but if not use a hand tool as Proxxson as shown below.
After assembled blocks, to peel off cover tape 3mm width 0.2mm thick stainless steel strips or 1mm dis steel bars are glued on the block as shown.


