The polypropylene tubes are clear and can withstand 3000 RCF during Centrifugation while the transparent polystyrene tubes can withstand 1400 RCF. 

These polypropylene/ polystyrene tubes are generally used in Ria, Coagulation and Bacteriology. 

The PP tubes can accept common acids, alkalies & solvents at room temperature while the PS tubes can accept mild bases, weak acids but not organic solvents.

Capacity:-

12 x 75mm/PP

12 x 75mm/PS

Cap. for 12mm RIA Tubes