Wheaton 11mm seal, aluminum blue, ptfe/silicone. Open top aluminum seal with ptfe/silicone size: 11mm designed use with 12 x 32mm crimp top vials open-top seal provides for filling or retrieving contents with a syringe and as closures for many autosampler and instrumentation applications. Manufacturer: wheaton science manufacturer part no: 224211-01. Warning: this product can expose you to chemicals including tetrafluoroethylene, which are known to the state of california to cause cancer. Prop 65 warning
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