This is a 48 inch (4 foot) 1/4" ID rubber hose with 3/8 inch swivel female flare fittings on both ends 

It is rubber hose, not the plastic type that cracks and doesn't bend in cold conditions

NEW Product

Features:

• Propane hose transfers propane from your RV's tank to its gas piping system
• Swivel feature on one end allows the fitting to turn without the hose twisting when you hook up
• Rubber construction is resistant to kinks and cracking
• UL and CSA certified
• Made in the USA