15611-04-04 Hydraulic Hose Swivel Assembly 1/4”ultra flexible hose, internal thread NPT x internal thread NPT. The 1/4" NPT hose assembly is made of high wear-resistant outer woven hydraulic hose. Working pressure: 5800 psi. A hose assembly is crimped at both ends to internal thread NPT x internal thread NPT. Inner core: Two layers of steel wire woven outer layer, temperature working range:-40 ℃ to +100 ℃/ -40 ℉ to +212 ℉.