1, clean glass tubes diamter 12mm, 9mm, 17mm. 2, Both soda lime gass tubes and lead glass tubes. 3, Stems for sealing lamp We are specailized in making and supplying lamp , lamp making machinery and also lamp making parts.Our products include clean glass tube with diameter 9mm and 12mm and 17mm, stems with different sizes and all kinds of filaments . Energy saving lamp parts