3/8 in. Female Flare Swivel and 3/8 in. Female Flare Swivel connections. These hoses are rated up to 350 psig working pressure with a 400 lbs. pull test rating. Each hose comes with 2 ends and fully crimped brass ferrules.Hoses are great for RV LP gas applications3/8 in. hose I.D12 in. LFlexible thermoplastic UL and CGA approved hose. These products contain a chemical known to the state of California to cause cancer and birth defects or reproductive harm – https://www.p65warnings.ca.gov/chemicals/lead-and-lead-compounds