standard ground stoppers

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Conical ground joint stoppers, borosilicate glass 3.3

Conical ground joint stoppers, borosilicate glass 3.3

Conical ground joint stoppers, borosilicate glass 3.3

Conical ground joint stoppers, borosilicate glass 3.3

Conical ground joint stoppers, borosilicate glass 3.3

Conical ground joint stoppers, borosilicate glass 3.3

Conical stoppers, NS, PE

Conical stoppers, NS, PE

Conical stoppers, NS, PE

Conical stoppers, NS, PE

Conical stoppers, NS, PE

Conical stoppers, NS, PE

Conical stoppers, NS, PE

Conical stoppers, NS, PE

Hollow stoppers, hexagonal plate, borosilicate glass 3.3

Hollow stoppers, hexagonal plate, borosilicate glass 3.3

Hollow stoppers, hexagonal plate, pointed bottom, borosilicate glass 3.3

Hollow stoppers, hexagonal plate, pointed bottom, borosilicate glass 3.3