4)Usually adopt the high quality imported 5.0 borosilicate hydrochloric acid glass tube. 5)Short screw Thread ND9 vials(11.6*32mm) for GC and HPLC, suit for Aijiren, waters ,Thermo Scientific, Beckman, CTC, Gilson, Knauer, Shimadzu, Spark, Varian, VWR( Mercy)/ Hitachi, PerkinElmer.