Sponge tape used for fitting when mounting solid type competition resin drift tires DRA/DRC on wheels.
It is made of a slightly hard sponge material and comes with a tape about 2.5mm thick. DRA/DRC tires have a tapered inner diameter, so you can easily assemble by removing the backing paper from the mounting tape and attaching it to the wheel. In order to prevent the tire from falling off while driving, fix the gap between the wheel and tire with instant adhesive in several places.