Zünd Präzisionsoptik AG and Optivac AG in Diepoldsau combine plan optics, micro-optics and optical coating expertise under one roof. For over 50 years, we have manufactured high-precision compact and micro prisms, filters, mirrors and custom bonding systems for medical technology, industry, metrology, laser optics and telecommunications. Optivac provides 200+ coating processes, from anti-reflective layers to mirror and beamsplitter coatings. With cutting-edge technology and Swiss precision, we deliver prototypes and high-volume production.

BZ Cleaning Services is a professional cleaning company based in Goldach, serving St. Gallen, Thurgau and the surrounding regions. We provide reliable office, building and household cleaning for private clients, businesses and property managers. Our services include regular maintenance cleaning, move-out cleaning, window cleaning, construction cleaning, medical practice cleaning and janitorial services. Using modern equipment and efficient methods, our dedicated team delivers thorough, flexible and dependable cleaning solutions tailored to your needs.