These jack plugs are made of a reliable rubber material, so they are durable, waterproof, moisture-proof and sealable. In addition, they are fairly easy to use and install. And this size is compatible with most hydraulic horizontal jacks, so you can rest assured that they will fit your needs well. _ Color: Black. Material: Rubber. - Size: 13*11*9mm This floor jack plug is made of high-quality rubber material, easy to use and install, waterproof, moisture-proof, sealing. The most suitable thickness, lightweight design, beautiful appearance, high-quality jack plug. Rubber plug has excellent heat resistance, cold resistance, dielectric resistance and ozone resistance. Aging resistance and excellent physiological inert air, tasteless, non-corrosive. Unique design. Standard size cone design for easy insertion or removal. Packing list: 25 plugs