Cylindrical dropping funnels are indispensable laboratory tools ideal for laboratory processes that require an exact and gradual addition of substances. Their cylindrical structure ensures a consistent flow of liquids, enabling controlled and accurate dispensing. Dropping Funnels are Cylindrical. Manufactured from Borosilicate 3.3 Glass, these funnels come with an Interchangeable Stopper. These Funnels have a glass or PTFE key stopcock. Packing: 1Pc/Pk Image(s) are representative of the product group and not necessarily the individual product. Item Code Capacity (ml) Cone NS Socket NS 18.00.0441.PTFE 50 (PTFE KEY) 24/29 24/29 18.00.0442.GL 100 (GLASS KEY) 24/29 24/29 18.00.0443.GL 250 (GLASS KEY) 24/29 24/29 18.00.0444.PTFE 500 (PTFE KEY) 24/29 24/29 18.00.0445.PTFE 1000 (PTFEKEY) 24/29 24/29 18.00.0442.PTFE 100 (PTFE KEY) 24/29 24/29 18.00.0443.PTFE 250 (PTFE KEY) 24/29 24/29