Comparison : Item # G12-530-__.___-_.___, Series G12 Annealed Borosilicate Glass Disc
Item # G12-530-00.734-0.256, Series G12 Annealed Borosilicate Glass Disc
Item # G12-530-00.750-0.130, Series G12 Annealed Borosilicate Glass Disc
Item # G12-530-00.922-0.256, Series G12 Annealed Borosilicate Glass Disc
Item # G12-530-01.172-0.256, Series G12 Annealed Borosilicate Glass Disc