The more compact the parts and fasteners, the more susceptible they are to contamination particles. Even microscopic metal particles down to 500, 200 or even 100 microns in size may cause malfunctions. WEBER therefore relies on utmost technical cleanliness. This technology is effective: the number of contamination particles and their sizes resulting from the assembly process are demonstrably reduced. The number of particles in the size category of 100 to 150 microns decreases from 1,526 to 226, the number of particles between 150 and 200 microns decreases by 338 thanks to WEBER technology.