... sample for test 4.Prompt delivery Carbon black in plastic & rubber industry 1.Character:Type: n220 ,n330,n550. ... +/-1.3 Usage:maily applied to various rubber products such as tyres, rubber overshoes, cable, seal ring, tape etc ... :1.Mixed container,we can mix different items in one container. 2.Quality control,before shipment,free ... , welcome here! (hot sale) Carbon black in plastic & rubber industry