granite stone ball 1.stone ball 2.high quality with good price 3.own factories 4.20 years experience granite ball(G614,G682,G636,G681,G603,G635,red ball, black ball, white ball, grey ball, green ball, rust ball, rusty sphere) etc.feature:set and without base setSize( diameter):150mm, 200mm,250mm, 300mm, 350mm, 400mm, 450mm, 500mm, 550mm, 600mm, 700mm, 800mm, 900mm. G617 stone ball