Upgrade your portable propane heater with this high-quality brass Mr. Heater fitting adapter. Designed to fit 3/8" male pipe thread and 3/8" male flare thread connections, this adapter ensures a secure and reliable connection for your heating needs. With a heating rating of 3000-3999 BTU, this portable heater fitting is perfect for spaces up to 100 sq ft or less. Featuring an analog/mechanical control style and an auto shut-off safety feature, this fitting adapter is easy to use and provides peace of mind. It operates with less than 10 W of power and is Energy Star-rated with an annual fuel utilization efficiency (AFUE) of 1 star. Made in the United States with high-quality materials, this adapter is a reliable addition to your heating system.