1.Professional manufacturer of rubber piston for syringe 2.1.0.5ml,3ml,5ml,10ml,20ml,30ml, ... 3.nature piston;latex free piston Specifications: (1)Material: ... test of state pharmaceutical administration. (4)Size :0.05ml, 0.1ml, 0.3ml, 0.5ml, 1ml, 2ml/3ml, 5ml, 10ml, ... 5)color:black (6)Packing: 38x32.5x22.5cm 0.5ML 300000pcs/ctn 1ML 130000pcs/ctn 2ML 35000pcs/ctn ...