Stainless Steel Overbraid RV Pigtail Propane Hose. Type 1 ACME X 1/4" Inv. Flare Stainless Steel Overbraid protects the hose from Critters chewing the hose and UV Rays. Overbraid protection along with the hose material made of Thermo-Rubber reduces stiffening resulting in a longer service life. Benefits includes a High Capacity Type 1 (400,000 BTU's prior to bypass), 260 Degree thermal shut-off device and a reverse flow backcheck in the Type 1. CERTIFICATION - UL569 Hose Assembly / ANSI Z21-81 Type 1. Used for LP Gas Only Used to connect a dual LP Cylinder system to the Two-Stage Regulator. The MB Sturgis Type 1 provides a higher rate of flow resulting in a decreased potential for the system to go into bypass mode therefore shutting down the gas supply to the system. Stainless Steel Overbraid provides added protection to the hose. The MB Sturgis RV Type 1 (Dark Green) includes an internal back check to ensure the system does not allow a back flow gas leak.