Cooling Water Circulating Pump Working Temp. :(optional) -120~Room temp. Tank capacity (L):5,8, ... 16,20,30,50,80 20L Cooling Water Circulating Pump Features:•Side in the wind side exhaust, corner round turn ... and laser equipments: biological pharmacy 4.Scientific experiment equipments: molecular pump rotation evaporation meter, distillation, fermentation device, laser, metal 5.rapid ...