Photo 1 of 5 Pieces Borosilicate Blowing Tubes 4in Long High heat resistance, acid and alkali resistance, and good stability

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Photo 1 of 5 Pieces Borosilicate Blowing Tubes 4in Long High heat resistance, acid and alkali resistance, and good stabilityPhoto 2 of 5 Pieces Borosilicate Blowing Tubes 4in Long High heat resistance, acid and alkali resistance, and good stability