Marshall Excelsiors MER425 Series Flexible Pigtail Hoses feature a Green Female (QCC) Type 1 Acme Nut and 1/4 Male Inverted Flare connection. These pigtail hoses are designed with excess flow protection. The MER425 Series hoses are available in the following lengths: 12, 15, 18, 20, 24, 30, 36, 48, and 60. Choose from retail packaging or bulk packaging. RV use approved.