Translucent silicone stoppers are especially suited for procedures demanding high purity, such as tissue culture work and food science applications. Food-grade quality stoppers are nontoxic, chemically inert, and resist particle buildup. Withstand repeated sterilization, as well as temperatures from –76 to 392°F (–60 to 200°C). Peak at 428°F (220°C). European size (DIN no.) is noted on stopper. Autoclavable.