Frey Scientific 586695 Natural Cork, 16mm Top Diameter, 12mm Bottom Diameter, #4 Size (Pack of 100)
Brand: Frey Scientific
Size 4 rubber stopper for sealing containers (sold separately)
XX-grade coarse-grained stopper may include some irregularities
Cork for corrosion resistance
16mm top diameter and 12mm bottom diameter
Package contains 100 stoppers