Portable Backpacking Fuel Transfer Device Gas Canister Refill Adapter Canister V
【 Multifunction 】 The Canister refill adapter can refill gas from isobutane fuel canister( EN417 Lindal Valve) to another isobutane canister. 【 Vent Vaule 】 A vent valve that can reduce the internal pressure of the fuel canister on the bottom side(empty gas receiving canister).