This polycarbonate roller features a lens effect and an anti-slip surface that will not adhere to your materials. The roller pin is adjustable through three pairs of rings that produce different thicknesses. Details: Clear and black Adjustable to three different depths (2.5 mm, 3.5 mm and 5 mm) Set of 2 rollers Anti-slip Will not adhere to your materials Made of polycarbonate with a lens effect