... :4kg,6kg,8kg,10kg,12kg,14kg......64kg top grade cast iron kettlebell with rubber basespecifiction:4kg,6kg,8kg,10kg,12kg,14kg ... .it is good for the trainer to exercise in crossfit club , indoors ,and any place you likeour rizhao land sea fitness ... the the high quality and best price. top grade cast iron kettlebell with rubber base