1) Hollow balls are made by Shiny PVC compond through Rotary Moulding Process and they are hollow from Inside 2) Weight Of thE ball is 156-163 gms & dia is 72-74 mm 3) Hollow balls are excellent balls on Astroturf Pitches as they donâ??t wobble and their speed is faster than Cork Centre balls 4) We provide the option to the Buyers to have sticker on Both sides of the Hollow balls 5)Balls are also available in Phthalate Free PVC but the cost is bit higher by 3% 6) Available in several colors and also on Choice of PMS shade too Provided minimmum quant 6) Available with the options of large size sticker in rectangular & round shape forms as shown in the picture ( Note the price can vary on the size of stickers selected)