Thrifco Plumbing 4406691 1/2 Inch x 36 Inch Yellow Gas Flex. Includes 1/2 Flare Adapter to Pipe Thread. Made of stainless steel coated with a yellow epoxy coating along the entire length of the connector. The coating gives it extra protection against corrosion when it comes in contact with chemicals that are typically found in households. Yellow coated polymer exterior & double corrugated for extra protection and flexibility.