[Description] Thread-empty plastic shell with rubber ring, installed with anti-rust permanent magnets of unique design, with about 110g Multifunctional Ceramic Pellets inside Weight of the ball: 163g / pc [Advantages] 1. Adopt pure physical principle for washing, no harmful chemicals 2. One time rinse is enough, save water 3. Traditional Detergent can be reduced in volume or even completely replaced, eco, safe and economical 4. Natural way to kill bacterial, take care of your clothes 5. Effectively avoid twist of clothes during washing 6. Long life span, repeatedly used up to 365 times or 1 year at least, normally even more 7. Pellets inside the ball are refillable or replaceable and the plastic shell can be used again and again 8. Easy to use, what you need to do is to put the Laundry Ball into the washing machine for the normal operation Diameter: 70 mm Diameter of the shell: 100mm