Features: brand new and high quality Thickened pure aluminum grinding head: made of high-quality engineering pure aluminum alloy with high structural strength, overall thickening, sturdiness and durability. Fine polishing without burrs: CNC polishing with precision machine tools, the surface is smoother and without burrs, so that the pipes are perfectly and seamlessly fitted. Application: Good performance, convenient and practical, suitable for home and professional use. Lightweight Size: Portable and small size, easy to store and carry, bring you convenience. Water-based coating thick water-based coating, non-stick grinding for head. Specifications: Material: Aluminum Color: As the Picture Shows Diameter:20,28, 38, 63, 88, 132 Product Dimension: approx. 25x25x24mm/0.98x0.98x0.94inches 30x30x25mm/0.08x1.18x0.98inches 37x37x26mm/1.46x1.46x1.02inches 45x45x25mm/1.77x1.77x0.98inches 55x55x29mm/2.17x2.17x1.14inches 68x68x30mm/2.68x2.68x1.18inches Net Weight:20g/0.04lbs 28g/0.06lbs 38g/0.08lbs 63g/0.14lbs 88g/0.19lbs 132g/0.29lbs Note: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1Set PPR Hot Melt Machine for Head