shangyu hongda plastics industry co., ltd . It build in 2003. It is near hangzhou city. We are a leader manufacturer roll on line and plastic ball china 1.Our hollow size :9.5mm180mm 2.Our solid size:1mm55mm 3.Our bottle capacity:10ml,20ml,30ml, 40ml, 50ml, 60ml, 75ml, 120ml,180ml 4.Our ...