Please provide more details about the product so I can rewrite accurately. To ensure the description stays consistent with the original brand, specifications, models, and functions, share the following: Brand name and exact product family (if applicable) Model numbers or part numbers for the couplings Material(s) (eg stainless steel, brass, aluminum, polymer) and finish Type of coupling (eg hydraulic, pneumatic, quickconnect, flange, pushtoconnect, threaded, camlock, hose barb, etc.) Size and dimensions (diameter, thread type, thread size, overall length) Connection details (inlet/outlet types and compatibility with other components) Operating specifications (pressure range, temperature range, chemical compatibility if relevant) Key features (sealing type, leakage rate, vibration resistance, anticorrosion properties, leak detection, etc.) Standards and certifications (eg ISO, CE, RoHS, ASTM) and any compliance notes Any included accessories or mounting options (gaskets, clamps, adapters) Applications or recommended use cases (industries, fluids, media) Performance characteristics (flow rate, conductivity, etc., if applicable) and care instructions Any existing 23 use scenarios you want highlighted If you already have a current product description or bullet points for '1. Couplings' please paste them here. I will rewrite them into a clear, customerfriendly version with concise bullets, emphasizing function, compatibility, size, material, and performance, and including 23 practical use scenarios, while keeping a professional and trustworthy tone and staying within the 3000word limit.