CLV6-48 JB Industries 3/8" x 48" Black Charging Hose with Ball Valve - 3/8" KOBRA HOSE - Single 48" (122 cm) 3/8" Black CLV6 Series Kobra® High Pressure Hose with UL approved ball valve shut-off. These hoses feature gasket seal fittings and are rated for 600 psi working and 3,000 psi burst. Kobra® high pressure hoses are made from Kevlar® - the same material that stops bullets in bullet-proof vests. Kevlar® makes our hoses strong and flexible, while the nitrile cover extends the life of the hoses better than neoprene. Kobra® hoses are made in the USA.