What kind of two roll mixing mill is suitable for the laboratory ?

In rubber&plastic production industry, basically we will use mechanical equipment, such as two roll mixing mill, Rubber internal etc that used for batch production,The two roll mill machine is not only used in mass production of rubber & plastic industry ,but also make using of the experiment in laboratory,school,research institute, so what size of the two roll mill will be better when doing the experiment ? 

As for the size of the machine is mainly based on the amount of materials used in an experiment per time ,The present experiments uses the mill machine mainly has 2 inches (the advantage is light, only 150kg, but only for silicone materias), 4 inches, 6 Inch, 8 inch, 9 inch . 

The following are pictures of various types of two roll mixing mill:

All the above models are experimental,It can also be used in small quantities,You can choose it based on your requirement,The purchase hotline : 18098265764