Material: These furniture leveling screws are made of metal and rubber, more toughness, longevity and corrosion resistance, rustproof, the screw thread is deep that is not easy to slide during rotation and not easy to fall off. No more scratches: This product has a round base, smooth surface without burrs, exquisite workmanship. Thickened base, solid and stable, the round rubber base will not harm or scratch the floor. No squeaking: These leveling feet are a solution for uneven table legs, you can install them at the bottom of your product to keep balanced, also as a bonus floor protection mat that dampens sound, your furniture will slide quietly and easily, without squeaking. Height adjustment: By using this product, you can adjust the height of the table and stool according to your preference to meet your daily needs. The minimum height is 6 mm and the maximum height is 25 mm after installed. Package Content: 22pcs Adjustable Furniture Leg Leveling Feet, the size of this product is M6*18*25mm. Color: Black