Quick Answer Material choice depends on depth, environment, and budget. Brass: cost-effective, shallow water (

Quick Answer Yes, we can share relevant case studies and customer references (with their permission). We have documented projects in ROV/AUV, offshore energy, scientific research, and […]

Quick Answer Yes, HYSF offers installation training (virtual or in-person), detailed documentation, and video tutorials. On-site support available for large projects ($2,000/day + travel). Free virtual […]

Quick Answer Warranty claims are processed within 48 hours. Send photos/video of the issue, order number, and failure description. We’ll evaluate and ship replacement within 3-5 […]

Quick Answer Yes, factory visits are welcome by appointment. We offer facility tours, product demonstrations, and technical meetings. Visits help build trust and ensure product fit. […]

Quick Answer HYSF accepts wire transfer (T/T), PayPal, credit cards (Visa, MasterCard), and Letter of Credit (L/C) for large orders. Wire transfer is most common for […]