Description: Made of pure copper and it is in high quality. Easy to use and clean. Double-roller version, according to the oil viscosity free switch. Oiling fast, rolling back and forth along the wheel can achieve the desired results, simple and convenient. save oil, save 95% oil compare with the traditional way. Suitable for making leather, very practical. Specification: Material: Pure Copper Size: Approx. 25x40mm/0.98x1.57inch Package Includes: 2 Pieces Heads 1 Piece Box