SIZE & SPECS: 12" length, 1/4" inside diameter; rated up to 350 PSI maximum WP. CONNECTIONS: ACME (Type 1/QCC) nut x 1/4" inverted male flare (not NPT). SAFETY FEATURES: Built-in thermal protection (in case of fire) and excess flow protection (in case of a broken gas line). APPLICATION: Connects your camper’s 1/4" inverted flare inlet regulator to QCC/Type 1 propane tanks (up to 40 lbs). CERTIFICATION: UL569 standards for propane gas use; safe, durable, and legally compliant in the U.S. and Canada