According to the rules of bowling , 8 a drilled bowling ball must weigh no more than 16 lbs .
According to the rules of bowling , 8 a drilled bowling ball have a diameter between 8.500 and 8.595 in .
According to the rules of bowling , 8 a drilled bowling ball must weigh no more than 16 lbs and have a diameter between 8.500 and 8.595 in .