borosilicate glass culture tubes glass 12*75,13*100,16*100,16*150,18*150,18*200,20*150, silicon ,plastic wooden stopper ISO NO.NAMESpecifications Amount KH904Glass tube φ12*75 5000 KH904Glass tube φ12*100 4000 KH903 Glass tube φ13*100 3500 KH903Glass tube φ16*100 2500 KH902 Glass tube φ16*150 1700 KH902 Glass tube φ18*180 1000 KH901 Glass tube φ20*150 800 borosilicate glass culture tubes