Laboratory Rubber Stopper Plugs Test Tube Stoppers - Pieces - 14mm 19mm

19mm(Outer Dia.xHxInner Dia): approx.20x30x19mm/0.79x1.18x0.75". 10 Pieces Rubber Stopper Bungs. 14mm (Outer Dia.xHxInner Dia): approx.17x26x14mm/0.67x1.02x0.55". Fit kinds of test tubes or bottles etc.

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