The furniture knob, in gold color, is made of zamak, a material that does not rust. It is an alloy of pseudo-silver, magnesium, aluminum, and copper.
The total length is 35mm. To choose the correct size, depending on the size of the surface and the position/mode (vertical, horizontal) it will be placed, measure from the center of one hole to the center of the other.
Care: Avoid using detergents, caustic or chlorinated liquids for cleaning. A dry cloth or plain water is enough to keep the product clean.