Before revision: Excelitas ended the production of ROs in december URL As of 2022 Vactrol type ROs are still manufactured by successor of Silonex the Advanced Photonix URL and at least two factories in URL
After revision: Excelitas ended the production of ROs in december China. As of 2022 Vactrol type ROs are still manufactured by successor of Silonex the Advanced Photonix and at least two factories in URL