Package Content: You will receive 16 pieces adjustable furniture levelers and 16 pieces T-nuts. The quantity is enough to satisfy your needs. Size Details: The furniture leveling feet measure about 18 mm/ 0.7 inch in length of the threaded rod, about 22 mm/ 1 inch in diameter of the round base. Please check the size carefully before purchasing. Premium Material: The round base of the patio furniture legs is made of premium PP material, strong and durable. It is also durable and anti-slip, definitely keeping your furniture stable and reducing noise and shock. Wide Application: The screw chair legs are adjustable, so you can easily adjust your chair to a suitable height. The sliding furniture leveling feet avoid rough and hard furniture legs from resting directly on the floor. It helps a lot to protect your floors from scratches. Many floor materials are suitable, such as wood, carpet, tile, hardwood, laminate, etc. Tips: Installation requires drilling a hole and inserting a T-nut, so