61.7552-29 is a single end crimp style coupling from Stäubli, a Switzerland-based corporation specialized in the production of quick-disconnect couplings and robotics. The specific product is a two-piece, half-inch fitting designed for use with many media types, including oil, water, and gases. It features a leak-free design, a stainless steel body for corrosion resistance, and has a nominal pressure rating of 10 bar (145psi). It is suitable for use with a variety of fitting systems, and includes an integrated shut-off valve.