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Masterflex BioPharm Plus L/S Precision Pump Tubing, platinum-cured silicone, Tubing Size: 13, Autoclavable: Autoclavable, Translucent, Diameter Inner: 1/32 in., 0.8 mm, Thermal-set Rubber, Siloxane Polymers, Amorphous Silica, Overall Length: 25 ft., 760 c