... b) Quality black rubber bulb4) Model 97-4402 : a) Glass dropper 4" curved, 12/pk b) Quality black rubber bulbPacking ... 12pcs/boxWe have many other lab glassware, including stain dish, glass stirring rods, desiccator,Petri dish, media storage, funnel, separatory ... ,Erlenmeyer flask, angler distilling flask, measuring cylinder, pipette, test tube,distilling apparatus, graham condenser etc. glass dropper