Innovative, patent-protected design of clean room clamps. Designs correspond to ASME-BPE specifications and regulations, suitable for lines with outer diameters of between 6.4 mm and 168.4 mm. Rounded edges and corners, and no exposed threads to avoid the adherence of dirt. All plastic components conform to FDA regulations (food and drug approval in the USA). All metal components are made of corrosion-proof stainless steel with high gloss-polished surfaces.