These 1000 ml PYREX glass separating funnels have PTFE (Polytetrafluorethylene). Pyrex Separating Funnel is the best quality and most famous separating funnel in Bangladesh. 1000 ml Pyrex separating funnel most used in school-college, different industrial laboratories in Bangladesh. Labasiabd.com Bangladesh is a supplier and wholesaler of 1000 ml glass made separating funnel.