Description: With this adapter you are not able to overfill the smaller bottles it will only put in the tank as much as it can hold, you are also able to back fill into larger tank if you got in a situation where your larger tank runs dry; Hook up the smaller cylinder with this adapter and it will equalize the pressure between the two tanks; Compare with others, it has a safety feature; When flow capacity is too high, it will automatically close at the end; This feature controls the flow capacity of the propane transfer and ensures the tank will never overflow; Great for Ice Fishermen, mountain men, outdoorsmen, and all campers and power outages; Specification: Material: Brass Inner Diameter: approx. 24mm/ 0.94 inch Overall Length: approx. 54mm/ 2.12 inch Package Includes: 1 Piece Tank Refill Adaptor
