The roller is made of 2.0 mm thick grain leather, additionally stiffened (only the body, sides are not stiffened) with 2 mm thick plastic, thanks to which it retains its shape during use. The decorative rivets are made of zamak, are cast with a nickel coating, do not rust, but may tarnish under the influence of weather conditions.The mounting rivets are made of steel and may rust under the influence of weather conditions.