Bottles, Reagent C-11141 Clear glass, narrow neck with flat head dust proof ground glass stopper. Bottles, Reagent C-11143 Clear glass, narrow ground neck with polypropylene dust proof stopper. Bottles, Reagent C-11146 Clear Glass, wide neck with flat head dust proof ground glass stopper. Bottles, Reagent C-11149 Amber colour Glass, narrow neck with flat head dust proof, ground glass stopper. Bottles, Reagent C-11151 Amber colour Glass, narrow ground neck with Polypropylene dust proof stopper.