Each pack includes 12 clear double sided adhesive non-sliders.
Each round non-slider is 0.78 inch in diameter.
The double-sided tape is covered with white paper. To use, simply take the round non-slider, stick it under your ramp or rail, then peel off the while paper.
Since these have a double-sided adhesive, they are more permanemt than traditional foam non-sliders. They will stick your ramps/rails to the surface.
These non-slides can also be reshaped and are made of an acrylic glue material.
Be carful when sticking your ramps/rails to painted surfaces. It may remove the paint if it is removed too quickly. Remove with caution.