High Flow Capacity: Our 37ft 3/4" CSST gas line features a 16mm (0.63") inner diameter and a 20mm (0.79") outer diameter, providing exceptional BTU delivery capability. It's perfect for larger equipment, ensuring ample gas flow to meet various needs Rust-Resistant Design: The interior of the gas line is constructed from durable SUS304 stainless steel, while the exterior is covered with a UV-resistant yellow plastic jacket. This design ensures superior corrosion resistance, making it ideal for underground installations Flexible and Secure: Made from corrugated stainless steel tubing, which is highly flexible and can be easily cut and bent to fit your specific requirements. The one-piece molding design reduces potential leak points, providing enhanced safety and peace of mind Versatile Applications: Propane to natural gas conversion kit includes two 3/4" NPT male adapter fittings for quick and easy connections. It is suitable for a variety of applications, including natural gas and propane. Whether you need it for propane fire pits, gas ranges, or water heaters, this gas line ensures reliable performance Exceptional Durability: Constructed with premium materials, this propane gas line offers long-lasting durability and reliability.